drm/i915/uc: Rename intel_uc_fw.fw to .type

This field is used to determine which kind of firmware the struct
describes (GuC/HuC) - the name does not reflect.

The enum used here have "type" in the name, so let's go with that.

Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Oscar Mateo <oscar.mateo@intel.com>
Signed-off-by: Arkadiusz Hiler <arkadiusz.hiler@intel.com>
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170315133415.15343-1-arkadiusz.hiler@intel.com

drivers/gpu/drm/i915/intel_uc.c

@@ -331,7 +331,7 @@ void intel_uc_prepare_fw(struct drm_i915_private *dev_priv,
 	 * version are TWO bytes each (i.e. u16), although all pointers and
 	 * offsets are defined in terms of bytes (u8).
 	 */
-	switch (uc_fw->fw) {
+	switch (uc_fw->type) {
 	case INTEL_UC_FW_TYPE_GUC:
 		/* Header and uCode will be loaded to WOPCM. Size of the two. */
 		size = uc_fw->header_size + uc_fw->ucode_size;
@@ -351,7 +351,7 @@ void intel_uc_prepare_fw(struct drm_i915_private *dev_priv,
 		break;
 
 	default:
-		DRM_ERROR("Unknown firmware type %d\n", uc_fw->fw);
+		DRM_ERROR("Unknown firmware type %d\n", uc_fw->type);
 		err = -ENOEXEC;
 		goto fail;
 	}