linux-firmware: add Marvell SD8897-B0 firmware combo image

WLAN (SDIO) firmware version: 15.69.2.p11
Bluetooth (SDIO) firmware version: 15.28.2.p11

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

WHENCE

@@ -727,6 +727,9 @@ Version: 14.66.9.p96
 File: mrvl/sd8797_uapsta.bin
 Version: 14.66.11.p151
 
+File: mrvl/sd8897_uapsta.bin
+Version: 15.69.2.p11
+
 File: mrvl/usb8797_uapsta.bin
 Version: 14.69.11.p179