linux-firmware: wl12xx-Update STA firmware

Update STA firmware to version 6.1.3.50.55 via a new file
(wl1271-fw-2.bin) that includs new API between driver and
firmware.
Remove AP NVS, the STA and the AP uses the same NVS file
Signed-off-by: Shahar Levi <shahar_levi@ti.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

WHENCE

@@ -1459,14 +1459,16 @@ Licence: Redistributable. See LICENCE.broadcom_bcm43xx for details.
 Driver: wl12xx - Texas Instruments 802.11 wireless LAN driver
 
 File: wl1271-fw.bin
-File: wl1271-nvs.bin
+File: wl1271-fw-2.bin
 File: wl1271-fw-ap.bin
-File: wl1271-nvs-ap.bin
+File: wl1271-nvs.bin
 
 Licence: See LICENCE.ti-connectivity for details.
 
 	Station:      wl1271-fw.bin version 6.1.0.50.350 (RM version 206)
+	Station:      wl1271-fw-2.bin version 6.1.3.50.55
 	Access Point: wl1271-fw-ap.bin version 6.2.0.0.30 (RM version 6.2.0.0.6)
+
 	The nvs file includes two parts:
 	 - radio calibration
 	 - ini setting parameters