src/include: Remove spaces before tabs

Fix the following warning detected by checkpatch.pl:

WARNING: please, no space before tabs

TEST=Build and run on Galileo Gen2

Change-Id: If60a58021d595289722d1d6064bea37b0b0bc039
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18652
Tested-by: build bot (Jenkins)
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/include/pc80/i8259.h b/src/include/pc80/i8259.h
index ea6637e..857c5c8 100644
--- a/src/include/pc80/i8259.h
+++ b/src/include/pc80/i8259.h
@@ -69,7 +69,7 @@
 #define SLAVE_PIC_ICW3		0xa1
 #define    SLAVE_ID		0x02
 
-#define MASTER_PIC_OCW1 	0x21
+#define MASTER_PIC_OCW1		0x21
 #define SLAVE_PIC_OCW1		0xa1
 #define    IRQ2			(1 << 2)
 #define    ALL_IRQS		0xff