ath10k-firmware: update firmware version for QCA988X

Updates the ath10k firmware version for QCA988X to version
10.2.4.70.10-2, which appears to fix problems with the 5GHz wireless
failing on TP-Link Archer C7 v2 when using a Nexus 5X phone. Fixes
issue #20854.

Signed-off-by: Robert Hancock <hancockrwd@gmail.com>

SVN-Revision: 47454

package/firmware/ath10k-firmware/Makefile

@@ -57,7 +57,7 @@ define Package/ath10k-firmware-qca988x/install
 		$(PKG_BUILD_DIR)/ath10k/QCA988X/hw2.0/board.bin \
 		$(1)/lib/firmware/ath10k/QCA988X/hw2.0/
 	$(INSTALL_DATA) \
-		$(PKG_BUILD_DIR)/QCA988X/10.2.4/firmware-5.bin_10.2.4.70-2 \
+		$(PKG_BUILD_DIR)/QCA988X/10.2.4/firmware-5.bin_10.2.4.70.10-2 \
 		$(1)/lib/firmware/ath10k/QCA988X/hw2.0/firmware-5.bin
 endef