soc/intel/common/opregion: Get rid of opregion.c

Get rid of custom opregion implementation and use drivers/intel/gma/opregion
implementation instead.

Test: boot Windows 10 on google/chell and google/edgar using Tianocore
payload with GOP init, observe Intel graphics driver loaded and functional.

Change-Id: I5f78e9030df12da5369d142dda5c59e576ebcef7
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
Reviewed-on: https://review.coreboot.org/21703
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/soc/intel/braswell/Kconfig b/src/soc/intel/braswell/Kconfig
index dc2f40d..1154c04 100644
--- a/src/soc/intel/braswell/Kconfig
+++ b/src/soc/intel/braswell/Kconfig
@@ -48,7 +48,8 @@
 	select HAVE_SPI_CONSOLE_SUPPORT
 	select HAVE_FSP_GOP
 	select GENERIC_GPIO_LIB
-	select SOC_INTEL_COMMON_GFX_OPREGION
+	select INTEL_GMA_ACPI
+	select INTEL_GMA_SWSMISCI
 
 config VBOOT
 	select VBOOT_STARTS_IN_ROMSTAGE