Replace several argument type from positive to nonnegative
Replace several argument type from positive to nonnegative

Some of the arguments' type should be nonnegative instead of
positive, change it accordingly.

Signed-off-by: Wesley Sheng <2dd9bb739c19413d08ba3d30d3b08863544ccf6b@microchip.com>

Microsemi/switchtec-user,Microsemi/switchtec-user