src: Remove unneeded whitespace

Change-Id: I6c77f4289b46646872731ef9c20dc115f0cf876d
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/29161
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/arch/x86/acpigen.c b/src/arch/x86/acpigen.c
index de3d39e..426a542 100644
--- a/src/arch/x86/acpigen.c
+++ b/src/arch/x86/acpigen.c
@@ -453,7 +453,7 @@
  *	FIELDLIST_OFFSET(0x84),
  *	FIELDLIST_NAMESTR("PMCS", 2),
  *	};
- * acpigen_write_field("UART", l ,ARRAY_SIZE(l), FIELD_ANYACC | FIELD_NOLOCK |
+ * acpigen_write_field("UART", l, ARRAY_SIZE(l), FIELD_ANYACC | FIELD_NOLOCK |
  *								FIELD_PRESERVE);
  * Output:
  * Field (UART, AnyAcc, NoLock, Preserve)