mainboard/aopen/Kconfig: remove extra whitespace

Change-Id: I69ee67c35113d98e034bdccf5d00e8452d3d9bd2
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/778
Tested-by: build bot (Jenkins)
Reviewed-by: Rudolf Marek <r.marek@assembler.cz>
diff --git a/src/mainboard/aopen/Kconfig b/src/mainboard/aopen/Kconfig
index 5b5497c..b0fc66b 100644
--- a/src/mainboard/aopen/Kconfig
+++ b/src/mainboard/aopen/Kconfig
@@ -13,5 +13,5 @@
 config MAINBOARD_VENDOR
 	string
 	default "AOpen"
-	
+
 endif # VENDOR_AOPEN