linux-firmware: add frimware for mediatek bluetooth chip (MT7922)

Add binary firmware for MT7922 Bluetooth devices

File: mediatek/BT_RAM_CODE_MT7922_1_1_hdr.bin
Version: 20210901204456

Signed-off-by: mark-yw.chen <mark-yw.chen@mediatek.com>
Signed-off-by: Josh Boyer <jwboyer@kernel.org>

WHENCE

@@ -5136,6 +5136,15 @@ Version: 20210727184325
 
 Licence: Redistributable. See LICENCE.mediatek for details.
 
+--------------------------------------------------------------------------
+
+Driver: mt7922 - MediaTek MT7922 bluetooth chipset
+
+File: mediatek/BT_RAM_CODE_MT7922_1_1_hdr.bin
+Version: 20210901204456
+
+Licence: Redistributable. See LICENCE.mediatek for details.
+
 --------------------------------------------------------------------------
 Driver: nfp - Netronome Flow Processor