e1000e: remove redundant might_sleep()

Now that mutex_lock() calls might_sleep() the driver doesn't have to here.

Signed-off-by: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/net/e1000e/ich8lan.c b/drivers/net/e1000e/ich8lan.c
index fe6dc3d..f991b14 100644
--- a/drivers/net/e1000e/ich8lan.c
+++ b/drivers/net/e1000e/ich8lan.c
@@ -630,8 +630,6 @@
 	u32 extcnf_ctrl, timeout = PHY_CFG_TIMEOUT;
 	s32 ret_val = 0;
 
-	might_sleep();
-
 	mutex_lock(&swflag_mutex);
 
 	while (timeout) {