tree b5a43e4aacbe365d47a456cd47cb4a8af4068ce7
parent 98f43bec14af073da25f53db2122fe3546f54095
author Thang Q. Nguyen <thang@os.amperecomputing.com> 1626770930 +0700
committer Thang Q. Nguyen <thang@os.amperecomputing.com> 1628062301 +0000

meta-ampere: mtjade: flash UEFI firmware at 4MB offset

UEFI firmware for Ampere Altra-based platform starts at offset 0x400000
but currently the firmware image is flashed start at offset 0. This
makes the Host fail to boot.
This commit supports offset option for the mtd-util's flashcp utility
and update the script to flash UEFI firmware starting at offset
0x400000.

Tested:
1. Turn on the Host.
2. Flash UEFI firmware. Wait for the flash complete and check if Host
   can boot successfully.
4. Turn off the Host.
5. Flash UEFI firmware. Wait for the flash complete.
6. Turn on the Host and check if Host can boot successfully.

Signed-off-by: Tung Nguyen <tung.nguyen@amperecomputing.com>
Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: I0d48bfd0a7b7350b46a98bf10fe4de3887f09f02