staging: wfx: use more power-efficient sleep for reset

Replace udelay() with usleep_range() as all uses are in a sleepable context.

Signed-off-by: Michał Mirosław <[e-mail]>
Link: https://lore.kernel.org/r/59[e-mail]
Signed-off-by: Greg Kroah-Hartman <[e-mail]>

drivers/staging/wfx/bh.c

···
 	gpiod_set_value_cansleep(wdev->pdata.gpio_wakeup, 1);
 	if (wfx_api_older_than(wdev, 1, 4)) {
 		if (!completion_done(&wdev->hif.ctrl_ready))
-			udelay(2000);
+			usleep_range(2000, 2500);
 	} else {
 		// completion.h does not provide any function to wait
 		// completion without consume it (a kind of

drivers/staging/wfx/bus_spi.c

···
 		if (spi_get_device_id(func)->driver_data & WFX_RESET_INVERTED)
 			gpiod_toggle_active_low(bus->gpio_reset);
 		gpiod_set_value_cansleep(bus->gpio_reset, 1);
-		udelay(100);
+		usleep_range(100, 150);
 		gpiod_set_value_cansleep(bus->gpio_reset, 0);
-		udelay(2000);
+		usleep_range(2000, 2500);
 	}
 
 	INIT_WORK(&bus->request_rx, wfx_spi_request_rx);

drivers/staging/wfx/hwio.c

···
 			goto err;
 		if (!(cfg & prefetch))
 			break;
-		udelay(200);
+		usleep_range(200, 250);
 	}
 	if (i == 20) {
 		ret = -ETIMEDOUT;