[Detail]
sysfs_mmcblk is used by vendor & system process,
its type need to be moved to plat_public.
[Solution]
move type sysfs_mmcblk form non_plat to plat_public.
MTK-Commit-Id: 9221eb0ec44290e461e5602f7bfaf08b72994b4d
Change-Id: Ibe9a39e70e2071bfa9c88518fd34e232fc4844d6
CR-Id: ALPS04475279
Feature: [Android Default] SELinux, SEAndroid, and SE-MTK