bnx2x: Add missing VFs reference in macros

Add missing 57712_VF and 57800_VF to CHIP_IS_E2 and CHIP_IS_E3
macros (missing from commit 8395be5e).

Signed-off-by: Yuval Mintz <yuvalmin@broadcom.com>
Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>