drivers/intel/gma: Unify VBT related Kconfig names

Shuffle words and drop the _DATA_FILE suffix.

Change-Id: I0b0d50ea729e5580c0bc7b43f250ff387ce59cfc
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/26898
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
diff --git a/src/mainboard/gigabyte/ga-945gcm-s2l/Kconfig b/src/mainboard/gigabyte/ga-945gcm-s2l/Kconfig
index 5581a7f..d1a7b5d 100644
--- a/src/mainboard/gigabyte/ga-945gcm-s2l/Kconfig
+++ b/src/mainboard/gigabyte/ga-945gcm-s2l/Kconfig
@@ -32,7 +32,7 @@
 	select CHANNEL_XOR_RANDOMIZATION
 	select MAINBOARD_HAS_NATIVE_VGA_INIT
 	select REALTEK_8168_RESET if BOARD_GIGABYTE_GA_945GCM_S2L
-	select INTEL_GMA_VBT_HAVE_DATA_FILE
+	select INTEL_GMA_HAVE_VBT
 
 config MAINBOARD_DIR
 	string
diff --git a/src/mainboard/gigabyte/ga-g41m-es2l/Kconfig b/src/mainboard/gigabyte/ga-g41m-es2l/Kconfig
index 1e90eea..c6d708d 100644
--- a/src/mainboard/gigabyte/ga-g41m-es2l/Kconfig
+++ b/src/mainboard/gigabyte/ga-g41m-es2l/Kconfig
@@ -33,7 +33,7 @@
 	select HAVE_OPTION_TABLE
 	select HAVE_CMOS_DEFAULT
 	select HAVE_ACPI_RESUME
-	select INTEL_GMA_VBT_HAVE_DATA_FILE
+	select INTEL_GMA_HAVE_VBT
 
 config MAINBOARD_DIR
 	string