bnx2x: Fix AER semaphore release

Commit 7fa6f34 "AER revised" erroneously inserted an error-flow
in which a semaphore is released even though the attempt to take it
has failed.

Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c

@@ -10070,8 +10070,8 @@ static int bnx2x_prev_unload(struct bnx2x *bp)
 			/* If Path is marked by EEH, ignore unload status */
 			aer = !!(bnx2x_prev_path_get_entry(bp) &&
 				 bnx2x_prev_path_get_entry(bp)->aer);
+			up(&bnx2x_prev_sem);
 		}
-		up(&bnx2x_prev_sem);
 
 		if (fw == FW_MSG_CODE_DRV_UNLOAD_COMMON || aer) {
 			rc = bnx2x_prev_unload_common(bp);