staging: ccree: use size_t consistently

Fix declaration, implementation and wrapper function to use
the same size_t type we actually define the parameter to be.

Fixes: 3f268f5d ("staging: ccree: turn compile time debug log to params")
Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Gilad Ben-Yossef <gilad@benyossef.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>