liquidio: move macro definition to a proper place

The macro LIO_CMD_WAIT_TM is not specific to the PF driver; it can be used
by the VF driver too, so move its definition from a PF-specific header file
to one that's common to PF and VF.

Signed-off-by: Veerasenareddy Burru <veerasenareddy.burru@cavium.com>
Signed-off-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>