SIO: add ability to set as default IO sched

commit 1739fc5fd0c3802b9e13ee4f3d54806957a3724b followup

Signed-off-by: Adrien Tétar <adrien.tetar@hotmail.fr>
Merge pull request #26 from adridu59/sio-fix

SIO: add ability to set as default IO sched
Merge branch 'M7630AABBQMLZA404033I-nAa-master' into ics_chocolate-nAa-master