mb/**/{devicetree,overridetree}.cb: Indent with tabs

Use tabs instead of eight (sometimes less) spaces.

Change-Id: Ic3d61f5210d21d9613fc50b47b90af71f544169a
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44113
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
index 0a67d4d..d64bd8a 100644
--- a/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
+++ b/src/mainboard/google/poppy/variants/nautilus/devicetree.cb
@@ -144,8 +144,8 @@
 	register "PcieRpClkReqSupport[0]" = "1"
 	# RP 1 uses SRCCLKREQ1#
 	register "PcieRpClkReqNumber[0]" = "1"
-        # RP 1 uses uses CLK SRC 1
-        register "PcieRpClkSrcNumber[0]" = "1"
+	# RP 1 uses uses CLK SRC 1
+	register "PcieRpClkSrcNumber[0]" = "1"
 	# RP 1, Enable Advanced Error Reporting
 	register "PcieRpAdvancedErrorReporting[0]" = "1"
 	# RP 1, Enable Latency Tolerance Reporting Mechanism