ar3k: add patch and sysconfig for Qualcomm Atheros AR9462

 add patch and sysconfig for Qualcomm Atheros AR9462
Signed-off-by: Costa Yao <cqyao@qca.qualcomm.com>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

WHENCE

@@ -1839,6 +1839,8 @@ File: ar3k/ramps_0x01020200_26.dfu
 File: ar3k/ramps_0x01020200_40.dfu
 File: ar3k/AthrBT_0x31010000.dfu
 File: ar3k/ramps_0x31010000_40.dfu
+File: ar3k/AthrBT_0x11020000.dfu
+File: ar3k/ramps_0x11020000_40.dfu
 
 Licence: Redistributable. See LICENCE.atheros_firmware for details