crypto/scheduler: fix missing includes

crypto/scheduler: fix missing includes

This commit addresses the following compilation errors:

 In file included from build/include/rte_cryptodev_scheduler.h:37:0,
                  from /tmp/check-includes.sh.5355.c:1:
 build/include/rte_cryptodev_scheduler_operations.h:43:30: error: unknown
    type name 'uint8_t' struct rte_cryptodev *dev, uint8_t slave_id);
 [...]

Fixes: 097ab0bac017 ("crypto/scheduler: add API")

Signed-off-by: Adrien Mazarguil <adrien.mazarguil@6wind.com>
Acked-by: Fan Zhang <roy.fan.zhang@intel.com>