drm/i915/uc: fetch uc firmwares for each GT

The FW binaries are independently loaded on each GT. On MTL, the memory
is shared so we could potentially re-use a single allocation, but on
discrete multi-gt platforms we are going to need independent copies,
so it is easier to do the same on MTL as well, given that the amount
of duplicated memory is relatively small (~500K).
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: John Harrison <john.c.harrison@intel.com>
Cc: Alan Previn <alan.previn.teres.alexis@intel.com>
Reviewed-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221108020600.3575467-2-daniele.ceraolospurio@intel.com

drivers/gpu/drm/i915/i915_gem.c

@@ -1140,7 +1140,8 @@ int i915_gem_init(struct drm_i915_private *dev_priv)
 	if (ret)
 		return ret;
 
-	intel_uc_fetch_firmwares(&to_gt(dev_priv)->uc);
+	for_each_gt(gt, dev_priv, i)
+		intel_uc_fetch_firmwares(&gt->uc);
 	intel_wopcm_init(&dev_priv->wopcm);
 
 	ret = i915_init_ggtt(dev_priv);