Samples:Added the Kernel console parameter in boot.

For GP-MRB ACRN using ttyS0 as console,
since this is release bootargs file so ttyS0
will be skipped in booting but needed kernel
console ttyS2 in bootargs to get the Kernel console.

Tracked-On: #1655

Signed-off-by: santoshkumar <santoshkumar.laxminarayan.rai@intel.com>

Author: SANTOSHKUMARLAXMINARAYANRAI

devicemodel/samples/apl-mrb/sos_bootargs_release.txt

@@ -1 +1 @@
-console=tty0 module_blacklist=dwc3_pci 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_preemption=1 i915.context_priority_mode=2 i915.enable_gvt=1 i915.enable_guc=0x02 cma=64M@0-
+console=tty0 console=ttyS2,115200n8 module_blacklist=dwc3_pci 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_preemption=1 i915.context_priority_mode=2 i915.enable_gvt=1 i915.enable_guc=0x02 cma=64M@0-