habanalabs/gaudi: configure QMAN LDMA registers properly

LDMA registers are configured with a fixed value.
We add new define set which gives the configuration
a proper meaning.

Signed-off-by: Ofir Bitton <obitton@habana.ai>
Reviewed-by: Oded Gabbay <oded.gabbay@gmail.com>
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>