linux-firmware: update Marvell USB8997 firmware image to add WPA2 vulnerability fix

WLAN (USB) firmware version: V16.68.1.p162
Bluetooth (USB) firmware version: V16.26.1.p162

Both WLAN and bluetooth are on USB interface.
The combo image will be downloaded through WLAN only.

'V' flag indicate the firmware image includes the fix for WPA2
vulnerability issue.
Signed-off-by: Ganapathi Bhat <gbhat@marvell.com>

WHENCE

@@ -763,7 +763,7 @@ File: mrvl/pcie8997_wlan_v4.bin
 Version: 16.68.1.p97
 
 File: mrvl/usbusb8997_combo_v4.bin
-Version: 16.68.1.p113
+Version: V16.68.1.p162
 
 Licence: Redistributable. See LICENCE.Marvell for details.  Originates from
 http://git.marvell.com/?p=mwifiex-firmware.git