regulator: qcom-rpmh: Use correct buck for S1C regulator

Use correct buck, that is, pmic5_hfsmps515 for S1C regulator
of PM8350C PMIC.

Signed-off-by: satya priya <skakit@codeaurora.org>
Link: https://lore.kernel.org/r/1614155592-14060-7-git-send-email-skakit@codeaurora.org


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