mainboard/apple/macbookair4_2: Use tabs for indents

Change-Id: I2714553e2521f8178538755e3cfadec5c1fc6b12
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/16842
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>

src/mainboard/apple/macbookair4_2/acpi/platform.asl

@@ -13,11 +13,11 @@
 
 Method(_WAK,1)
 {
-        /* FIXME: EC support  */
+	/* FIXME: EC support  */
 	Return(Package(){0,0})
 }
 
 Method(_PTS,1)
 {
-        /* FIXME: EC support  */
+	/* FIXME: EC support  */
 }