input: touchscreen: raydium_wt030: add regulator support

Get and configure vcc and vdd regulators. Also add
disable sequence for the regulators.

Change-Id: I9e5eb9a4582eeb9236b87d486be9abbb7dc3e862
Signed-off-by: Venkata Prahlad Valluru <vvalluru@codeaurora.org>