padctrl: tegra210: allow dynamic pad voltage if selected from DT

padctrl: tegra210: allow dynamic pad voltage if selected from DT

Allow dynamic pad voltage configuration only if this is selected
from DT. This will avoid the mis configuration of pads if platform
does not want and driver try to do it.

Bug 1735995

Change-Id: I361a332fcf2b8f66ea23247db57db4704e050986
Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Reviewed-on: http://git-master/r/1114077
(cherry picked from commit 47613cd5e890fce32c6debfbd53d1c74fd220e7d)
Signed-off-by: Venkat Reddy Talla <vreddytalla@nvidia.com>
Reviewed-on: http://git-master/r/1117066
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>