ipq806x: fix BOARD_NAME spellings

the board names used by the upgrade check differ from the device names
in case, so always set them. We can't rely on tolower or similar since
different locales might have different rules for lower case letters, so
set them explicitily.

Fixes sysupgrade rejecting *-sysupgrade.tar because of the difference.

Signed-off-by: Kaspar Schleiser <kaspar@schleiser.de>
Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 47381

target/linux/ipq806x/image/Makefile

@@ -47,8 +47,9 @@ define Device/Default
 	KERNEL_PREFIX := $$(IMAGE_PREFIX)
 	IMAGES :=
 	KERNEL_IN_UBI :=
+	BOARD_NAME :=
 endef
-DEVICE_VARS += DEVICE_DTS KERNEL_IN_UBI
+DEVICE_VARS += DEVICE_DTS KERNEL_IN_UBI BOARD_NAME
 
 define Device/LegacyImage
 	KERNEL_SUFFIX := -uImage
@@ -78,12 +79,11 @@ define Device/DniImage
 	KERNEL_NAME := zImage
 	NETGEAR_BOARD_ID :=
 	NETGEAR_HW_ID :=
-	BOARD_NAME :=
 	IMAGES := factory.img sysupgrade.tar
 	IMAGE/factory.img := append-kernel | append-ubi | netgear-dni
 	IMAGE/sysupgrade.tar = sysupgrade-nand
 endef
-DEVICE_VARS += KERNEL_SIZE NETGEAR_BOARD_ID NETGEAR_HW_ID DEVICE_BLOCK_SIZE DEVICE_PAGE_SIZE BOARD_NAME
+DEVICE_VARS += KERNEL_SIZE NETGEAR_BOARD_ID NETGEAR_HW_ID DEVICE_BLOCK_SIZE DEVICE_PAGE_SIZE
 
 define Device/AP148
 	$(call Device/FitImage)
@@ -91,6 +91,7 @@ define Device/AP148
 	DEVICE_DTS := qcom-ipq8064-ap148
 	BLOCKSIZE := 128KiB
 	PAGESIZE := 2048
+	BOARD_NAME := ap148
 endef
 
 define Device/AP148-legacy
@@ -99,13 +100,14 @@ define Device/AP148-legacy
 	DEVICE_DTS := qcom-ipq8064-ap148
 	BLOCKSIZE := 128KiB
 	PAGESIZE := 2048
-	BOARD_NAME := AP148
+	BOARD_NAME := ap148
 endef
 
 define Device/DB149
 	$(call Device/FitImage)
 	DEVICE_DTS := qcom-ipq8064-db149
 	KERNEL_INSTALL := 1
+	BOARD_NAME := db149
 endef
 
 define Device/R7500