rockchip: rename "Rock Pi 4" to "Rock Pi 4A"

Kernel has added the different variants of the Rock Pi 4 in commit
b5edb0467370 ("arm64: dts: rockchip: Mark rock-pi-4 as rock-pi-4a
dts"). The former Rock Pi 4 is now Rock Pi 4A.

For compatibility with kernel 5.4, this rename has been held back
so far. Having switched to kernel 5.10 now, we can finally apply
it in our tree as well.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

package/boot/uboot-rockchip/Makefile

@@ -52,7 +52,7 @@ define U-Boot/rock-pi-4-rk3399
   BUILD_SUBTARGET:=armv8
   NAME:=Rock Pi 4
   BUILD_DEVICES:= \
-    radxa_rock-pi-4
+    radxa_rock-pi-4a
   DEPENDS:=+PACKAGE_u-boot-rock-pi-4-rk3399:arm-trusted-firmware-rockchip
   PKG_BUILD_DEPENDS:=arm-trusted-firmware-rockchip
   ATF:=rk3399_bl31.elf

target/linux/rockchip/image/armv8.mk

@@ -32,12 +32,12 @@ define Device/pine64_rockpro64
 endef
 TARGET_DEVICES += pine64_rockpro64
 
-define Device/radxa_rock-pi-4
+define Device/radxa_rock-pi-4a
   DEVICE_VENDOR := Radxa
-  DEVICE_MODEL := ROCK Pi 4
+  DEVICE_MODEL := ROCK Pi 4A
   SOC := rk3399
-  SUPPORTED_DEVICES := radxa,rockpi4
+  SUPPORTED_DEVICES := radxa,rockpi4a radxa,rockpi4
   UBOOT_DEVICE_NAME := rock-pi-4-rk3399
   IMAGE/sysupgrade.img.gz := boot-common | boot-script | pine64-img | gzip | append-metadata
 endef
-TARGET_DEVICES += radxa_rock-pi-4
+TARGET_DEVICES += radxa_rock-pi-4a