cpu/intel: Indent with tabs

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

ERROR: code indent should use tabs where possible
WARNING: please, no space before tabs

TEST=Build and run on Galileo Gen2

Change-Id: I5bcd82561ef5856e99055d46528dcf3a283d2310
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18846
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
diff --git a/src/cpu/intel/haswell/romstage.c b/src/cpu/intel/haswell/romstage.c
index c82f3b9..351c05d 100644
--- a/src/cpu/intel/haswell/romstage.c
+++ b/src/cpu/intel/haswell/romstage.c
@@ -147,8 +147,8 @@
 	const int num_guards = 4;
 	const u32 stack_guard = 0xdeadbeef;
 	u32 *stack_base = (void *)(CONFIG_DCACHE_RAM_BASE +
-	                           CONFIG_DCACHE_RAM_SIZE -
-	                           CONFIG_DCACHE_RAM_ROMSTAGE_STACK_SIZE);
+				   CONFIG_DCACHE_RAM_SIZE -
+				   CONFIG_DCACHE_RAM_ROMSTAGE_STACK_SIZE);
 
 	printk(BIOS_DEBUG, "Setting up stack guards.\n");
 	for (i = 0; i < num_guards; i++)