src/include: Indent code using tabs

Fix the following error and warning detected by checkpatch.pl:

ERROR: code indent should use tabs where possible
WARNING: please, no spaces at the start of a line

TEST=Build and run on Galileo Gen2

Change-Id: I487771b8f4d7e104457116b772cd32df5cd721a6
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18646
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/include/device/i2c.h b/src/include/device/i2c.h
index 6316748..b3a5cca 100644
--- a/src/include/device/i2c.h
+++ b/src/include/device/i2c.h
@@ -100,7 +100,7 @@
  * [start][slave addr][w][data][stop]
  */
 static inline int i2c_write_raw(unsigned int bus, uint8_t chip, uint8_t *data,
-			        int len)
+				int len)
 {
 	struct i2c_seg seg =
 		{ .read = 0, .chip = chip, .buf = data, .len = len };