crypto: msm: Increase max num of descriptors

There exist scenarios where memory gets corrupted due
to the limitation on the number of descriptors that
can fit into the PIPE descriptor FIFO.

The fix is to increase the max number of descriptor by
128 (to 0x500).

Change-Id: I770374043ad11cf320ca1bec1f00840b10b86218
Signed-off-by: Mona Hossain <mhossain@codeaurora.org>