staging: wfx: fix pm_mode timeout

Maximum request time (how long a request wait for the medium) is set in
firmware to 512TU
Signed-off-by: Jérôme Pouiller <jerome.pouiller@silabs.com>
Link: https://lore.kernel.org/r/20191217161318.31402-37-Jerome.Pouiller@silabs.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/wfx/sta.c

@@ -359,7 +359,7 @@ static int wfx_update_pm(struct wfx_vif *wvif)
 	}
 
 	if (!wait_for_completion_timeout(&wvif->set_pm_mode_complete,
-					 msecs_to_jiffies(300)))
+					 TU_TO_JIFFIES(512)))
 		dev_warn(wvif->wdev->dev,
 			 "timeout while waiting of set_pm_mode_complete\n");
 	return hif_set_pm(wvif, &pm);