bnx2x: Self-test false positive

Self-test false positive
- The memory test should use a mask according to the chip type
- In the register test, check the port only once and not inside the for
  loop (not causing a failure - just ugly)

Signed-off-by: Yitchak Gertner <gertner@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>