meta-ampere:mtjade:u-boot: Pass system reset status to kernel via bootargs

Backport a patch file from meta-yadro/meta-nicole/recipes-bsp/u-boot/ to
add the Aspeed reset reason to bootargs so kernel so kernel application
can query it.

Tested: /proc/cmdline must contain:
 - resetreason=power after A/C power
 - resetreason=watchdog after bmc reboot

Signed-off-by: Chanh Nguyen <chanh@os.amperecomputing.com>
Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: I7e75cccfa0fecfa9a66572e02de0f1c8c1d519a1
2 files changed