habanalabs: Add mask for CS type bits in CS flags

hl_cs_sanity_checks() extracts the CS type bits of the CS flags, by
masking out the non-type bits.
To save the need for updating the function whenever new bits for
non-type flags are added, add an explicit mask for the CS type bits.

Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>