qlcnic: Do not sleep while holding spinlock

This patch reverts commit a4791254
("qlcnic: change mdelay to msleep") which overwrote a commit
68b3f28c


("qlcnic: Fix scheduling while atomic bug")

Signed-off-by: Shahed Shaikh <shahed.shaikh@qlogic.com>
Signed-off-by: Jitendra Kalsaria <jitendra.kalsaria@qlogic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>