i9100g: cleanup board specific init

Change-Id: Ieae39e59286025c3144b72fbf1d36fe657be330c
i9100g: remove mass storage entry from storage list

Change-Id: I757362421797950b1a8c031db980aa36441a5154
i9100g: enable vsync sysfs notifications

Change-Id: I1e4509fe47a77f9f71d766d89c6cc0ae4a7f4f23
i9100g: enable powerwidgets

Change-Id: Iaff33c3dad2ea460a0e2832fbfec14ba10abb4c9
i9100g: Remove unsupported overlays

config_geocodeProviderPackageName & config_networkLocationProviderPackageName