Revert "linux-firmware: update Marvell SD8897-B0 firmware combo image"

That commit rewound the firmware version to a prior (lower numbered)
release.  The prior release might be more stable in STA mode, but after some
experimentation, I think the newer one works somewhat better in AP mode.

This reverts commit 1ee099cd071ae8fdb9ca776077c07a329f9bcf03.

Change-Id: If8391ba3563efb9aba058ef96b3fae1e1ea7281d
diff --git a/WHENCE b/WHENCE
index ba2c33f..6d3c892 100644
--- a/WHENCE
+++ b/WHENCE
@@ -730,7 +730,7 @@
 Version: 14.66.11.p151
 
 File: mrvl/sd8897_uapsta.bin
-Version: 15.68.201.p113
+Version: 15.69.2.p11
 
 File: mrvl/usb8797_uapsta.bin
 Version: 14.68.29.p26
diff --git a/mrvl/sd8897_uapsta.bin b/mrvl/sd8897_uapsta.bin
index e68a049..70732a6 100644
--- a/mrvl/sd8897_uapsta.bin
+++ b/mrvl/sd8897_uapsta.bin
Binary files differ