staging: comedi: gsc_hpdi: usleep_range is preferred over udelay

Fix checkpatch issue: "CHECK: usleep_range is preferred over udelay; see
Documentation/timers/timers-howto.txt".  `udelay()` is only called once
from a place where sleeping is allowed.  Replace it with a call to
`usleep_range()` with a reasonable upper limit.
Signed-off-by: Ian Abbott <abbotti@mev.co.uk>
Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/comedi/drivers/gsc_hpdi.c

@@ -520,7 +520,7 @@ static int gsc_hpdi_init(struct comedi_device *dev)
 
 	/* wait 10usec after reset before accessing fifos */
 	writel(BOARD_RESET_BIT, dev->mmio + BOARD_CONTROL_REG);
-	udelay(10);
+	usleep_range(10, 1000);
 
 	writel(ALMOST_EMPTY_BITS(32) | ALMOST_FULL_BITS(32),
 	       dev->mmio + RX_PROG_ALMOST_REG);