Rename vendor identifiers in Kconfig

Board identifiers use them without underscore, too. Unify that.

Change-Id: I146384ef6dbe601ad131dada8224f43e6c18433d
Signed-off-by: Patrick Georgi <patrick@georgi-clan.de>
Reviewed-on: http://review.coreboot.org/674
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/mainboard/digitallogic/Kconfig b/src/mainboard/digitallogic/Kconfig
index a98aa1d..9f490b0 100644
--- a/src/mainboard/digitallogic/Kconfig
+++ b/src/mainboard/digitallogic/Kconfig
@@ -1,4 +1,4 @@
-if VENDOR_DIGITAL_LOGIC
+if VENDOR_DIGITALLOGIC
 
 choice
 	prompt "Mainboard model"
@@ -20,4 +20,4 @@
 	string
 	default "DIGITAL-LOGIC"
 
-endif # VENDOR_DIGITAL_LOGIC
+endif # VENDOR_DIGITALLOGIC