CircleCI: fix #1058 and partly #984

CircleCI: We currently drop coreboot 4.11 builds.
- There is a file missing in the builds. Not sure why/how this is happening
src/soc/intel/fsp_broadwell_de/romstage/romstage.c:41:10: fatal error: build.h: No such file or directory
Example:https://app.circleci.com/pipelines/github/tlaurion/heads/877/workflows/7d0248d2-459c-42ad-b741-8fd56a75d527/jobs/2487
- kgpe-d16_workstation building for all GPUs is unfortunately taking too much time to build (40 minutes).
- Not sure why, but it seems that the kernel build paralellization is not working for 4.11 while it works for 4.13
Makefile: Uncomment MAKE_JOBS which passes the number of jobs to numbers cores by default and --max-load of 16
CircleCI: Remove CPUS statement to use Makefile default
modules/newt: force build with one make job, otherwise there is a race condition in module which fails randomly expecting build modules. (TODO: FIX)

Interestingly, building all coreboot 4.13 boards is happening on a clean commit just above 1h limit.

More details:
- CircleCI changed job build time to a maximum of 1h each.
- CircleCI now permits parallelization of 30 jobs
- 6000 build minutes a month.
- Still waiting for osresearch/heads CircleCI project to be unlocked (currently not recognized as open source project?!)

.circleci/config.yml

@@ -16,7 +16,7 @@ commands:
       - run:
           name: Make Board
           command: |
-            rm -rf build/<<parameters.target>>/* build/log/* && make CPUS=32 V=1 BOARD=<<parameters.target>> <<parameters.subcommand>> || touch ./tmpDir/failed_build
+            rm -rf build/<<parameters.target>>/* build/log/* && make V=1 BOARD=<<parameters.target>> <<parameters.subcommand>> || touch ./tmpDir/failed_build
           no_output_timeout: 3h
       - run:
           name: Output build failing logs
@@ -184,36 +184,21 @@ workflows:
           requires:
             - prep_env
 
-      # Coreboot 4.11
-      #- build_and_persist:
-      #    name: coreboot_411_buildstack
-      #    target: kgpe-d16_workstation
-      #    subcommand: coreboot 
-      #    requires:
-      #      - heads_musl-cross
-
-      # Coreboot 4.11
-      #- build_and_persist:
-      #    name: kgpe-d16_workstation
-      #    target: kgpe-d16_workstation
-      #    subcommand: coreboot
-      #    requires:
-      #      - coreboot_411_buildstack
-
-      # Coreboot 4.13
-      - build_and_persist:
-          name: coreboot_413_buildstack
-          target: x230-hotp-maximized
-          subcommand: coreboot
-          requires:
-            - heads_musl-cross
       # Coreboot 4.13
       - build_and_persist:
           name: x230-hotp-maximized
           target: x230-hotp-maximized
           subcommand: ""
           requires:
-            - coreboot_413_buildstack
+            - heads_musl-cross
+
+      # Coreboot 4.11
+      #- build_and_persist:
+      #    name: librem_l1um
+      #    target: librem_l1um
+      #    subcommand: ""
+      #    requires:
+      #      - x230-hotp-maximized
 
       - save_cache:
           requires:
@@ -322,34 +307,34 @@ workflows:
           subcommand: ""
           requires:
             - x230-hotp-maximized
+      #KGPE-D16 turned off because CircleCI built time needs to be optimized. Kernel doesn't seem to enforce MAKE_JOBS properly
+      #- build:
+      #    name: kgpe-d16_workstation-usb_keyboard
+      #    target: kgpe-d16_workstation-usb_keyboard
+      #    subcommand: ""
+      #    requires:
+      #      - librem_l1um
 
-              #- build:
-              #name: kgpe-d16_workstation-usb_keyboard
-              #target: kgpe-d16_workstation-usb_keyboard
-              #subcommand: ""
-              #requires:
-              #- x230-hotp-maximized
-
-              #- build:
-              #name: kgpe-d16_server
-              #target: kgpe-d16_server
-              #subcommand: ""
-              #requires:
-              #- x230-hotp-maximized
-
-              #- build:
-              #name: kgpe-d16_server-whiptail
-              #target: kgpe-d16_server-whiptail
-              #subcommand: ""
-              #requires:
-              #- x230-hotp-maximized
-
-              #- build:
-              #name: librem_l1um
-              #target: librem_l1um
-              #subcommand: ""
-              #requires:
-              #- x230-hotp-maximized
+      #- build:
+      #    name: kgpe-d16_server
+      #    target: kgpe-d16_server
+      #    subcommand: ""
+      #    requires:
+      #      - librem_l1um
+
+      #- build:
+      #    name: kgpe-d16_server-whiptail
+      #    target: kgpe-d16_server-whiptail
+      #    subcommand: ""
+      #    requires:
+      #      - librem_l1um
+
+      #- build:
+      #    name: kgpe-d16_workstation
+      #    target: kgpe-d16_workstation
+      #    subcommand: ""
+      #    requires:
+      #      - librem_l1um
 
 ########################
 ########################

Makefile

@@ -32,7 +32,7 @@ log_dir		:= $(build)/log
 
 # Controls how many parallel jobs are invoked in subshells
 CPUS		?= $(shell nproc)
-#MAKE_JOBS	?= -j$(CPUS) --max-load 16
+MAKE_JOBS	?= -j$(CPUS) --max-load 16
 
 # Create the log directory if it doesn't already exist
 BUILD_LOG := $(shell mkdir -p "$(log_dir)" )

modules/newt

@@ -9,7 +9,9 @@ newt_url := https://releases.pagure.org/newt/$(newt_tar)
 newt_hash := 8d66ba6beffc3f786d4ccfee9d2b43d93484680ef8db9397a4fb70b5adbb6dbc
 
 newt_target := \
-	$(MAKE_JOBS) \
+	#We remove Makefile passed number of jobs to only pass one job, otherwise fails to build
+	#$(MAKE_JOBS) \
+	-j1 \
 	$(CROSS_TOOLS) \
 
 newt_output := \