arch: arm: dts: cpcap-mapphone: Set VAUDIO regulator always-on

arch: arm: dts: cpcap-mapphone: Set VAUDIO regulator always-on

VAUDIO regulator is used by cpcap codec and currently is enabled/disabled
by dapm logic, however, when regulator is turned off, various cpcap
functions (like jack detection) do not work.

Configure VAUDIO regulator-allowed-modes property while at it to enable
low-power regulator mode being set.

Signed-off-by: Ivaylo Dimitrov <ivo.g.dimitrov.75@gmail.com>
Link: https://patch.msgid.link/20250122164129.807247-2-ivo.g.dimitrov.75@gmail.com
Signed-off-by: Kevin Hilman (TI) <khilman@baylibre.com>