linux-firmware: add Marvell USB8897-B0 firmware combo image

WLAN (USB) firmware version: 15.68.4.p22
Bluetooth (USB) firmware version: 15.28.4.p22

The combo image will be downloaded through WLAN only.
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Frank Huang <frankh@marvell.com>

WHENCE

@@ -735,6 +735,9 @@ Version: 15.68.4.p22
 File: mrvl/usb8797_uapsta.bin
 Version: 14.68.29.p26
 
+File: mrvl/usb8897_uapsta.bin
+Version: 15.68.4.p22
+
 File: mrvl/pcie8897_uapsta.bin
 Version: 15.68.4.p22