samples: enable pstore via the sos kernel cmdline

Enable pstore via the sos kernel cmdline, as ABL doesn't
reserve memory and pass parameters for pstore.

Tracked-On: #1024
Signed-off-by: Zhi Jin <zhi.jin@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@intel.com>

Author: zjin7

devicemodel/samples/apl-mrb/sos_bootargs_debug.txt

@@ -1 +1 @@
-pci_devices_ignore=(0:18:2) module_blacklist=dwc3_pci console=tty0 console=ttyS0 i915.nuclear_pageflip=1 root=/dev/mmcblk1p1 rw rootwait quiet loglevel=3 no_timer_check consoleblank=0 i915.enable_initial_modeset=1 i915.tsd_init=7 i915.tsd_delay=2000 video=DP-1:d video=DP-2:d i915.avail_planes_per_pipe=0x01010F i915.domain_plane_owners=0x011111110000 i915.enable_guc_loading=0 i915.enable_guc_submission=0 i915.enable_preemption=1 i915.context_priority_mode=2 i915.enable_gvt=1 i915.enable_guc=0 hvlog=2M@0x6de00000 reboot_panic=p,w cma=64M@0-
+pci_devices_ignore=(0:18:2) module_blacklist=dwc3_pci console=tty0 console=ttyS0 i915.nuclear_pageflip=1 root=/dev/mmcblk1p1 rw rootwait quiet loglevel=3 no_timer_check consoleblank=0 i915.enable_initial_modeset=1 i915.tsd_init=7 i915.tsd_delay=2000 video=DP-1:d video=DP-2:d i915.avail_planes_per_pipe=0x01010F i915.domain_plane_owners=0x011111110000 i915.enable_guc_loading=0 i915.enable_guc_submission=0 i915.enable_preemption=1 i915.context_priority_mode=2 i915.enable_gvt=1 i915.enable_guc=0 hvlog=2M@0x6de00000 reboot_panic=p,w cma=64M@0- memmap=0x400000$0x6da00000 ramoops.mem_address=0x6da00000 ramoops.mem_size=0x400000 ramoops.console_size=0x200000