src: Get rid of unneeded whitespace

Change-Id: I630d49ab504d9f6e052806b516a600fa41b9a8da
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/26991
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

Documentation/RFC/config.tex

@@ -119,8 +119,8 @@ addaction ::= 'addaction' PATH ``ACTION''
 statement ::=
 		  option
 		| default
-        	| cpu
-        	| arch
+		| cpu
+		| arch
 		| northbridge
 		| southbridge
 		| superio