i9300: enable eject sdcard

Change-Id: Ic38fca9b0972e2e54b2972c4800e675203e2f04e
JIRA: CYAN-4539
Issue: https://jira.cyanogenmod.org/browse/CYAN-4539
(cherry picked from commit ae5353ed979b574c418afb6d4acb1808eafac4eb)