regulator: qcom_smd: Add MP5496 regulators

IPQ6018 SoC uses the PMIC MP5496. SMPA2 and LDOA2 regulator controls the
APSS and SDCC voltage scaling respectively. Add support for the same.

Signed-off-by: Kathiravan T <kathirav@codeaurora.org>
Link: https://lore.kernel.org/r/1592889472-6843-5-git-send-email-kathirav@codeaurora.org


Signed-off-by: Mark Brown <broonie@kernel.org>