Revert "msm: voltage control"

This reverts commit 87b4e4444462cee846b4f4d8a6deed4c632c2fb2.

for some reason upon removing this, random reboots are gone, will check futher what causes the issue, and hopefully bring it back in the future.

Signed-off-by: Jean Francis Dominique S. Mabalot <jfdsmabalot@redhat.com>