ipq806x: Enable AP148 fit image(.itb) generation

This change enables .itb image generation for AP148,
It will help us to boot and test AP148 with NOR flash.

Signed-off-by: Ram Chandra Jangir <[email protected]>

target/linux/ipq806x/image/Makefile

@@ -102,6 +102,7 @@ define Device/AP148
 	$(call Device/FitImage)
 	$(call Device/UbiFit)
 	DEVICE_DTS := qcom-ipq8064-ap148
+	KERNEL_INSTALL := 1
 	BLOCKSIZE := 128k
 	PAGESIZE := 2048
 	BOARD_NAME := ap148