device: Select VGA_ROM_RUN for non-FSP solution with PCIE DGPU

There are several options to have graphics in the payload (or OS
without dedicated GFX driver)

1. For onboard graphics initialization, GFX PEIM module inside
FSP binary is taking care of graphics initialization based on
HAVE_FSP_GOP Kconfig option and input VBT file. Hence no need
to load/execute legacy VGA OpROM in order to initialize onboard GFX.

2. In case of non-FSP solution, platform needs to select VGA_ROM_RUN
Kconfig to perform graphics initialization for PCI-E based discrete
card through VGA OpRom (SoC or Mainboard user can't select VGA_ROM_RUN
directly because it's part of choice option).

(Note: Some payloads, like SeaBIOS, are also able to run Option ROMs,
so coreboot does not need to consider option #2 above)

For payload like depthcharge, create VGA_ROM_RUN_DEFAULT Kconfig
for mainboard to select design with DGPU where OpROM is embedded
inside the DGPU card.

Also update NO_GFX_INIT Kconfig to avoid running VGA_ROM_RUN
by default in case SeaBIOS is used.

TEST=Able to get Pre-OS splash screen with AMD Radeon RX 5700 PCI-E
DGPU when mainboard user selects VGA_ROM_RUN_DEFAULT.

Change-Id: Iecb2fcdb105af449bc20ad727759cdef17d5e376
Signed-off-by: Subrata Banik <subrata.banik@intel.com>
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M src/device/Kconfig
1 file changed, 9 insertions(+), 2 deletions(-)