linux-firmware: Add firmware files for mtk mt7630/mt7650 chipsets

This fw is for bluetooth module for mt7630/mt7650 combo chip
Signed-off-by: Jay Hung <jay.hung@mediatek.com>
[bwh: Corrected driver name in WHENCE]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

LICENCE.ralink_a_mediatek_company_firmware

+Copyright (c) 2013, Ralink, A MediaTek Company 
+All rights reserved.
+
+Redistribution.  Redistribution and use in binary form, without 
+modification, are permitted provided that the following conditions are 
+met:
+
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+  following disclaimer in the documentation and/or other materials 
+  provided with the distribution. 
+* Neither the name of Ralink Technology Corporation nor the names of its
+  suppliers may be used to endorse or promote products derived from this
+  software without specific prior written permission. 
+* No reverse engineering, decompilation, or disassembly of this software 
+  is permitted.
+
+Limited patent license. Ralink Technology Corporation grants a world-wide, 
+royalty-free, non-exclusive license under patents it now or hereafter 
+owns or controls to make, have made, use, import, offer to sell and 
+sell ("Utilize") this software, but solely to the extent that any 
+such patent is necessary to Utilize the software alone, or in 
+combination with an operating system licensed under an approved Open 
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WHENCE

@@ -2110,3 +2110,11 @@ File: intel/ibt-hw-37.7.10-fw-1.80.2.3.d.bseq
 Licence: Redistributable. See LICENCE.ibt_firmware for details
 
 --------------------------------------------------------------------------
+
+Driver: btmtk_usb - Bluetooth USB driver
+
+File: mt7650.bin
+
+Licence: Redistributable. See LICENCE.ralink_a_mediatek_company_firmware for details
+
+--------------------------------------------------------------------------