ath79: fix indent for wrapped lines in image/nand.mk

This applies the common indent (one tab) for the wrapped lines of
domywifi_dw33d and glinet_gl-ar750s-nor-nand.

Signed-off-by: Adrian Schmutzler <freifunk@adrianschmutzler.de>

target/linux/ath79/image/nand.mk

@@ -52,7 +52,7 @@ define Device/domywifi_dw33d
   DEVICE_VENDOR := DomyWifi
   DEVICE_MODEL := DW33D
   DEVICE_PACKAGES := kmod-usb2 kmod-usb-storage kmod-usb-ledtrig-usbport \
-  kmod-ath10k-ct ath10k-firmware-qca988x-ct
+	kmod-ath10k-ct ath10k-firmware-qca988x-ct
   KERNEL_SIZE := 5120k
   IMAGE_SIZE := 98304k
   BLOCKSIZE := 128k
@@ -61,7 +61,7 @@ define Device/domywifi_dw33d
   IMAGES += factory.bin
   IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
   IMAGE/factory.bin := append-kernel | pad-to $$$$(KERNEL_SIZE) | append-ubi | \
-  check-size $$$$(IMAGE_SIZE)
+	check-size $$$$(IMAGE_SIZE)
 endef
 TARGET_DEVICES += domywifi_dw33d
 
@@ -115,7 +115,7 @@ define Device/glinet_gl-ar750s-nor-nand
   GL_UBOOT_UBI_OFFSET := 2048k
   IMAGES += factory.img
   IMAGE/factory.img := append-kernel | pad-to $$$$(GL_UBOOT_UBI_OFFSET) | \
-			append-ubi | check-kernel-size $$$$(GL_UBOOT_UBI_OFFSET)
+	append-ubi | check-kernel-size $$$$(GL_UBOOT_UBI_OFFSET)
   IMAGE/sysupgrade.bin := sysupgrade-tar | append-metadata
   SUPPORTED_DEVICES += glinet,gl-ar750s-nor
 endef