board/toradex/apalis-imx6/genimage.cfg: beautify file

Beatify this genimage .cfg file to have consistency with all genimage .cfg
files in Buildroot.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

board/toradex/apalis-imx6/genimage.cfg

@@ -4,12 +4,12 @@
 # from its internal flash memory (eMMC).
 
 image sdcard.img {
-  hdimage {
-  }
+	hdimage {
+	}
 
-  partition rootfs {
-    partition-type = 0x83
-    image = "rootfs.ext2"
-    size = 512M
-  }
+	partition rootfs {
+		partition-type = 0x83
+		image = "rootfs.ext2"
+		size = 512M
+	}
 }