ath10k: re-enable the firmware fallback mechanism for testmode

The ath10k testmode uses request_firmware_direct() in order to avoid
producing firmware load warnings. Disabling the fallback mechanism was a
side effect of disabling warnings.

We now have a new API that allows us to avoid warnings while keeping the
fallback mechanism enabled. So use that instead.

Signed-off-by: Andres Rodriguez <[e-mail]>
Reviewed-by: Kees Cook <[e-mail]>
Acked-by: Kalle Valo <[e-mail]>
Signed-off-by: Luis R. Rodriguez <[e-mail]>
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/net/wireless/ath/ath10k/testmode.c

···
 		 ar->hw_params.fw.dir, ATH10K_FW_UTF_FILE);
 
 	/* load utf firmware image */
-	ret = request_firmware_direct(&fw_file->firmware, filename, ar->dev);
+	ret = firmware_request_nowarn(&fw_file->firmware, filename, ar->dev);
 	ath10k_dbg(ar, ATH10K_DBG_TESTMODE, "testmode fw request '%s': %d\n",
 		   filename, ret);