linux-phytec-fsl

crypto: omap-sham - change the DMA threshold value to a define

Currently the threshold value was hardcoded in the driver. Having a define
for it makes it easier to configure.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>