This PS udpates the sriov init script to by default create the
max number of vfs supported by the card -1. Which works round
issues encoutered with many cards that prevents ther theroretical
max being attainable.
Change-Id: I01f8ce1f36b6053a5ef68119d87b67050ffe99d1
Signed-off-by: Pete Birley <pete@port.direct>