Revert "regulator: Defer init completion for a while after late_initcall"

This reverts commit d7ce17fb which is
commit 55576cf1853798e86f620766e23b604c9224c19c upstream.

It's causing "odd" interactions with older kernels, so it probably isn't
a good idea to cause timing changes there.  This has been reported to
cause oopses on Pixel devices.

Reported-by: Siddharth Kapoor <ksiddharth@google.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>