regulator: cpr3: support LDO handling for different LDO types

An LDO300 regulator is used by the GPU rail on msmfalcon. This LDO
is CPR managed and uses a different configuration/control scheme
compared to Kryo LDO. Add support for this LDO in the CPR3 framework.

CRs-Fixed: 1068294
Change-Id: Ia45152fe211f2ece1028c5cb978beebda86faba3
Signed-off-by: Tirupathi Reddy <tirupath@codeaurora.org>