drm/i915/dmc: remove unnecessary dmc_id validity check

The dmc_id comes from for_each_dmc_id() in parse_dmc_fw() ->
parse_dmc_fw_header() -> dmc_mmio_addr_sanity_check(). It's valid by
definition.
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/b4e1c862687f79861a5fa4bfa6797ecda2136fab.1675339447.git.jani.nikula@intel.com

drivers/gpu/drm/i915/display/intel_dmc.c

@@ -576,11 +576,6 @@ static bool dmc_mmio_addr_sanity_check(struct intel_dmc *dmc,
 	u32 start_range, end_range;
 	int i;
 
-	if (dmc_id >= DMC_FW_MAX) {
-		drm_warn(&i915->drm, "Unsupported firmware id %u\n", dmc_id);
-		return false;
-	}
-
 	if (header_ver == 1) {
 		start_range = DMC_MMIO_START_RANGE;
 		end_range = DMC_MMIO_END_RANGE;