fsl/fman: add dependency on HAS_DMA

A previous commit (5567e989) inserted a dependency on DMA
API that requires HAS_DMA to be added in Kconfig.

Signed-off-by: Madalin Bucur <madalin.bucur@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>