drm/i915: stop redefining INTEL_VGA_DEVICE

Now that the PCI ID macros allow us to pass in the macro to use, stop
redefining INTEL_VGA_DEVICE.

Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240515165651.1230465-2-jani.nikula@intel.com


Signed-off-by: Jani Nikula <jani.nikula@intel.com>