linux-firmware: add QCA6174 multi-board firmware

The board-2.bin file is a new format that support multiple board files.
This file is required for for recent QCA6174 modules.

Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Yegor Yefremov <yegorslists@googlemail.com>
Cc: Erik Larsson <karl.erik.larsson@gmail.com>
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

package/linux-firmware/linux-firmware.mk

@@ -146,6 +146,7 @@ endif
 # ath10k-qca6174
 ifeq ($(BR2_PACKAGE_LINUX_FIRMWARE_ATHEROS_10K_QCA6174),y)
 LINUX_FIRMWARE_FILES += ath10k/QCA6174/hw3.0/board.bin \
+			ath10k/QCA6174/hw3.0/board-2.bin \
 			ath10k/QCA6174/hw3.0/firmware-4.bin \
 			ath10k/QCA6174/hw3.0/firmware-6.bin
 LINUX_FIRMWARE_ALL_LICENSE_FILES += LICENCE.atheros_firmware