dmaengine: mv_xor: Enlarge descriptor pool size
dmaengine: mv_xor: Enlarge descriptor pool size

Now that we have 2 channels assigned to 2 CPUs and all requests are chained
on same channels, we need much more descriptors available to satisfy
async_tx workload.

3072 descriptors was found in our lab as the number of descriptors which
allow the async_tx stack to work without waiting for free descriptors on
submission of new requests.

Signed-off-by: Lior Amsalem <30ea2d6de7db423b663e964abd9bbdb7979e47a5@marvell.com>
Reviewed-by: Nadav Haklai <597b950a11648b2814571a5c9aa3212afe97b3f8@marvell.com>
Tested-by: Nadav Haklai <597b950a11648b2814571a5c9aa3212afe97b3f8@marvell.com>
Signed-off-by: Maxime Ripard <2d324f4ca95610bde432fa2af2f28cd21110687d@free-electrons.com>
Signed-off-by: Vinod Koul <5cf69c63beb17bf38d63aa0e923ee8256af0e205@intel.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs