drivers: misc: ti-st: Added BT enable/disable hook

Added functionality to call UART get sync/put sync
through pltform board file for run time PM adaptation.

Change-Id: Ieb9676391b1472d84355615eef9ba442fcb5fd81
Signed-off-by: x0099048 <x0099048@ti.com>
Signed-off-by: Pavan Savoy <pavan_savoy@ti.com>
3 files changed