linux-firmware: update Marvell SD8897-B0 firmware image to add WPA2 vulnerability fix

WLAN (SDIO) firmware version: V15.68.7.p154
Bluetooth (SDIO) firmware version: V15.68.7.p154
The combo image can be downloaded through either WLAN or
Bluetooth.

'V' flag indicate the firmware image includes the fix for WPA2
vulnerability issue.

Signed-off-by: Ganapathi Bhat <gbhat@marvell.com>

WHENCE

@@ -736,7 +736,7 @@ File: mrvl/usb8797_uapsta.bin
 Version: 14.68.29.p49
 
 File: mrvl/sd8897_uapsta.bin
-Version: 15.68.7.p87
+Version: V15.68.7.154
 
 File: mrvl/usb8897_uapsta.bin
 Version: 15.68.4.p103