linux-firmware: add Marvell PCIe8897-B0 WLAN firmware image

Version 15.69.201.p52
Signed-off-by: Bing Zhao <bzhao@marvell.com>
Signed-off-by: Frank Huang <frankh@marvell.com>

WHENCE

@@ -716,7 +716,7 @@ directly by Marvell.
 
 --------------------------------------------------------------------------
 
-Driver: mwifiex - Marvell Wi-Fi fullmac-type 802.11n card
+Driver: mwifiex - Marvell Wi-Fi fullmac-type 802.11n/ac cards
 
 File: mrvl/sd8787_uapsta.bin
 Version: 14.66.9.p96
@@ -727,6 +727,9 @@ Version: 14.66.11.p151
 File: mrvl/usb8797_uapsta.bin
 Version: 14.69.11.p179
 
+File: mrvl/pcie8897_uapsta.bin
+Version: 15.69.201.p52
+
 Licence: Redistributable. See LICENCE.Marvell for details.  Originates from
 http://git.marvell.com/?p=mwifiex-firmware.git