bnxt_en: Fix for system hang if request_irq fails

bnxt_en: Fix for system hang if request_irq fails

Orabug: 29357977

Fix bug in the error code path when bnxt_request_irq() returns failure.
bnxt_disable_napi() should not be called in this error path because
NAPI has not been enabled yet.

Fixes: c0c050c58d84 ("bnxt_en: New Broadcom ethernet driver.")
Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit c58387ab1614f6d7fb9e244f214b61e7631421fc)
Signed-off-by: Brian Maly <brian.maly@oracle.com>