[Bug 1932993] Re: AMDGPU: Support to load new MC firmware for Polaris12 32bit ASIC

Verification procedure,
1. apt update
2. apt install linux-image-5.10.0-1034-oem linux-headers-5.10.0-1034-oem
3. reboot
4. can login to desktop.
#uname -a
Linux CRBU-MTE-C7 5.10.0-1034-oem #35-Ubuntu SMP Wed Jun 23 09:55:56 UTC 2021 x86_64 x86_64 x86_64 GNU/Linux

5. check polaris12_32_mc.bin
#modinfo amdgpu | grep 32_mc
firmware: amdgpu/polaris12_32_mc.bin

** Tags removed: verification-needed-focal
** Tags added: verification-done-focal

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https://bugs.launchpad.net/bugs/1932993

Title:
AMDGPU: Support to load new MC firmware for Polaris12 32bit ASIC

Status in HWE Next:
New
Status in linux package in Ubuntu:
New
Status in linux-oem-5.10 package in Ubuntu:
Invalid
Status in linux source package in Focal:
New
Status in linux-oem-5.10 source package in Focal:
Fix Committed
Status in linux source package in Groovy:
In Progress
Status in linux-oem-5.10 source package in Groovy:
Invalid

Bug description:
[Impact]
AMD introduce a new firmware and has been SRUed in this public bug.
https://bugs.launchpad.net/ubuntu/focal/+source/linux-firmware/+bug/1929147

For the kernel(oem-5.10/groovy), also need other patches to load this
firmware.

[Fix]
Support to load polaris12_32_mc.bin

[Test]
1. Check by modinfo and cnofirm polaris12_32_mc.bin is loaded by amdgpu.ko

#modinfo amdgpu | grep polaris12_32_mc.bin
firmware: amdgpu/polaris12_32_mc.bin

2. Equipped the rx540(PD5001) that would trigger issue and system would bootup successfully into desktop.
*some rx540(PD5000) can't trigger the issue.

[Regression Potential]
Medium, introduce a brand new firmware may cause regression.

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