msm: 8930: enable charger, bms and ccadc

Enable charger for PM8038 platform and its dependent devices.
This is required to enable charging on devices using PM8038.

Also change gpio mux configuration to make sure that VBUS
is not pulled high when gpio_request is made.

Change-Id: Id64bc3846090bcaedf00f5f9177930618fa61605
Signed-off-by: David Keitel <dkeitel@codeaurora.org>