be2net: Fallback to the older opcode if MCC_CREATE_EXT opcode is not supported on the card

Instead of failing the init/probe code in the driver fallback to the older opcode to ensure
the driver is loaded thereby enabling users to upgrade the f/w to whatever version is required.

Signed-off-by: Somnath Kotur <somnath.kotur@emulex.com>
Signed-off-by: David S. Miller <davem@davemloft.net>