regulator: qpnp-lcdb: Introduce regulator off-on delay

Add turn on delay for LDO and NCP regulators to make sure that
these regulators are not turned on before it is fully discharged.

Change-Id: Idfb6034c31f3509d002157f85ad0da051abcc7c1
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>