ASoC: Intel: Delete an unnecessary check before the function call "release_firmware"

The release_firmware() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.
Signed-off-by: NMarkus Elfring <elfring@users.sourceforge.net>
Signed-off-by: NMark Brown <broonie@kernel.org>

sound/soc/intel/sst/sst_loader.c

@@ -324,8 +324,7 @@ void sst_firmware_load_cb(const struct firmware *fw, void *context)
 
 	if (ctx->sst_state != SST_RESET ||
 			ctx->fw_in_mem != NULL) {
-		if (fw != NULL)
-			release_firmware(fw);
+		release_firmware(fw);
 		mutex_unlock(&ctx->sst_lock);
 		return;
 	}