ath10k: QCA6174 hw2.1: add firmware WLAN.RM.1.1-00141 and board.bin

Add initial firmware and board files for QCA6174 hw2.1 family of chipsets.
Signed-off-by: Kalle Valo <kvalo@qca.qualcomm.com>
[bwh: Remove trailing whitespace from notice and convert it to UTF-8]
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>

WHENCE

@@ -2395,6 +2395,9 @@ File: ath10k/QCA988X/hw2.0/firmware-4.bin
 Version: 10.2.4.45
 File: ath10k/QCA988X/hw2.0/firmware-5.bin
 Version: 10.2.4.70.9-2
+File: ath10k/QCA6174/hw2.1/board.bin
+File: ath10k/QCA6174/hw2.1/firmware-5.bin
+Version: WLAN.RM.1.1-00141
 
 Licence: Redistributable. See LICENSE.QualcommAtheros_ath10k for details