mb/google/brya/var/agah: Select INCLUDE_NVIDIA_GPU_ASL

The agah variant will include an Nvidia GN20 series GPU, therefore
select the INCLUDE_NVIDIA_GPU_ASL Kconfig to include the respective
ASL code into the DSDT.

BUG=b:214581763
TEST=build patch train

Signed-off-by: Tim Wawrzynczak <twawrzynczak@chromium.org>
Change-Id: Icc718d01506ccb4dd42841239e96926f4ddaa9c9
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62932
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

src/mainboard/google/brya/Kconfig.name

@@ -4,6 +4,7 @@ config BOARD_GOOGLE_AGAH
 	bool "->  Agah"
 	select BOARD_GOOGLE_BASEBOARD_BRYA
 	select DRIVERS_GENESYSLOGIC_GL9750
+	select INCLUDE_NVIDIA_GPU_ASL
 	select PCIEXP_SUPPORT_RESIZABLE_BARS
 	select RT8168_GEN_ACPI_POWER_RESOURCE
 	select RT8168_GET_MAC_FROM_VPD