linux-firmware: add firmware for MT7922

Add binary firmware for MT7922 based devices

File: mediatek/WIFI_MT7922_patch_mcu_1_1_hdr.bin
Version: 20210727184234a
File: mediatek/WIFI_RAM_CODE_MT7922_1.bin
Version: 20210727184325

Signed-off-by: Deren Wu <deren.wu@mediatek.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -5100,6 +5100,17 @@ Version: 20210223142901
 
 Licence: Redistributable. See LICENCE.mediatek for details.
 
+--------------------------------------------------------------------------
+
+Driver: mt7922 - MediaTek MT7922 Wireless MACs
+
+File: mediatek/WIFI_MT7922_patch_mcu_1_1_hdr.bin
+Version: 20210727184234a
+File: mediatek/WIFI_RAM_CODE_MT7922_1.bin
+Version: 20210727184325
+
+Licence: Redistributable. See LICENCE.mediatek for details.
+
 --------------------------------------------------------------------------
 Driver: nfp - Netronome Flow Processor