bnx2x: fix wrong return from bnx2x_trylock_hw_lock

bnx2x_trylock_hw_lock() returns a bool :

true if succeeded to acquire the lock.
false in case of error.

-EINVAL is not an acceptable value, since its promoted to true.
Signed-off-by: NEric Dumazet <eric.dumazet@gmail.com>
Acked-by: NEilon Greenstein <eilong@broadcom.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/bnx2x/bnx2x_main.c

@@ -781,7 +781,7 @@ static bool bnx2x_trylock_hw_lock(struct bnx2x *bp, u32 resource)
 		DP(NETIF_MSG_HW,
 		   "resource(0x%x) > HW_LOCK_MAX_RESOURCE_VALUE(0x%x)\n",
 		   resource, HW_LOCK_MAX_RESOURCE_VALUE);
-		return -EINVAL;
+		return false;
 	}
 
 	if (func <= 5)