Bluetooth: Fix a possible sleep-in-atomic bug in bluecard_write_wakeup

The driver may sleep in the interrupt handler.
The function call path is:
bluecard_interrupt (interrupt handler)
  bluecard_write_wakeup
    schedule_timeout --> may sleep

To fix it, schedule_timeout is replaced with mdelay.

This bug is found by my static analysis tool(DSAC) and checked by my code review.
Signed-off-by: NJia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: NMarcel Holtmann <marcel@holtmann.org>

drivers/bluetooth/bluecard_cs.c

@@ -302,9 +302,7 @@ static void bluecard_write_wakeup(struct bluecard_info *info)
 			}
 
 			/* Wait until the command reaches the baseband */
-			prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
-			schedule_timeout(HZ/10);
-			finish_wait(&wq, &wait);
+			mdelay(100);
 
 			/* Set baud on baseband */
 			info->ctrl_reg &= ~0x03;
@@ -316,9 +314,7 @@ static void bluecard_write_wakeup(struct bluecard_info *info)
 			outb(info->ctrl_reg, iobase + REG_CONTROL);
 
 			/* Wait before the next HCI packet can be send */
-			prepare_to_wait(&wq, &wait, TASK_INTERRUPTIBLE);
-			schedule_timeout(HZ);
-			finish_wait(&wq, &wait);
+			mdelay(1000);
 		}
 
 		if (len == skb->len) {