msm: Add a separate config option for RPC PMAPP and RPC USB

MSMs in which the APPS does not have a direct access to
PMIC (over SSBI) use RPC to communicate with the PMIC.
Create a new config option for this RPC based PMIC APP
driver and enable it only for the required MSMs (7x27a,
7x30, fsm9xxx).

Also, add a similar option for RPC based HS USB and FS USB
driver.

Change-Id: I6d32243eb271f72a9055b346198bb274749297c1
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>