linux-firmware: add Marvell USB8766-A0 firmware combo image

WLAN (USB) firmware version: 14.68.22.p16
Bluetooth (USB) firmware version: 14.28.22.p16

The combo image will be downloaded through WLAN only.
Signed-off-by: Avinash Patil <patila@marvell.com>
Signed-off-by: James Jan <jjan@marvell.com>
Signed-off-by: Frank Huang <frankh@marvell.com>

WHENCE

@@ -726,6 +726,9 @@ Driver: mwifiex - Marvell Wi-Fi fullmac-type 802.11n/ac cards
 File: mrvl/sd8787_uapsta.bin
 Version: 14.66.35.p52
 
+File: mrvl/usb8766_uapsta.bin
+Version: 14.68.22.p16
+
 File: mrvl/sd8797_uapsta.bin
 Version: 14.66.11.p151