soc/intel/apollolake: Indent code using tabs

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

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

TEST=Build for reef

Change-Id: Id7a758463b95274c5e8bbdd67da0955f1ae78aac
Signed-off-by: Lee Leahy <leroy.p.leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18721
Reviewed-by: Philippe Mathieu-Daudé <philippe.mathieu.daude@gmail.com>
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/intel/apollolake/elog.c

@@ -56,8 +56,8 @@ static void pch_log_wake_source(struct chipset_power_state *ps)
 	if (ps->gpe0_sts[GPE0_A] & SMB_WAK_STS)
 		elog_add_event_wake(ELOG_WAKE_SOURCE_SMBUS, 0);
 
-        /* ACPI Wake Event - Always Log prev_sleep_state*/
-        elog_add_event_byte(ELOG_TYPE_ACPI_WAKE, ps->prev_sleep_state);
+	/* ACPI Wake Event - Always Log prev_sleep_state*/
+	elog_add_event_byte(ELOG_TYPE_ACPI_WAKE, ps->prev_sleep_state);
 
 	/* Log GPIO events in set A-D */
 	pch_log_gpio_gpe(ps->gpe0_sts[GPE0_A], ps->gpe0_en[GPE0_A], 0);