[Bug 1937004] Re: Support Mediatek MT7921 WiFi/BT

Some firmware fixes for MT7921 are not available in linux-firmware
version 1.198 forked for Impish. So fixes for impish linux-firmware will
be necessary.

** Tags added: oem-priority originate-from-1936882 somerville

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Title:
Support Mediatek MT7921 WiFi/BT

Status in HWE Next:
New
Status in linux package in Ubuntu:
Confirmed
Status in linux-firmware package in Ubuntu:
In Progress
Status in linux-oem-5.13 package in Ubuntu:
Invalid
Status in linux source package in Focal:
Invalid
Status in linux-firmware source package in Focal:
In Progress
Status in linux-oem-5.13 source package in Focal:
In Progress
Status in linux source package in Impish:
Confirmed
Status in linux-firmware source package in Impish:
In Progress
Status in linux-oem-5.13 source package in Impish:
Invalid

Bug description:
Mediatek MT7921 has been added to mainline kernel & firmware.

linux$ git log --graph --oneline korg/master -- \
drivers/bluetooth/ \
drivers/net/wireless/mediatek/mt76/mt7921/

linux-firmware$ git log --graph --oneline korg/master -- \
mediatek/WIFI_MT7961_patch_mcu_1_2_hdr.bin \
mediatek/WIFI_RAM_CODE_MT7961_1.bin \
mediatek/BT_RAM_CODE_MT7961_1_2_hdr.bin
* a7882719 linux-firmware: update frimware for mediatek bluetooth chip (MT7921)
* 2fd5139f linux-firmware: update firmware for MT7921 WiFi device to 20210612122753
* 42a66e5b linux-firmware: update firmware for MT7921 WiFi device
* 58fb90a0 linux-firmware: add frimware for mediatek bluetooth chip (MT7921)
* 391fd50d linux-firmware: add firmware for MT7921

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