soc: pinctrl-lpi: Initialise at late_initcall

Fixes booting with techpack online and modules disabled.
Without this it spits out a nasty NULL pointer dereference.

Signed-off-by: Yaroslav Furman <yaro330@gmail.com>
Signed-off-by: Park Ju Hyung <qkrwngud825@gmail.com>
Change-Id: I05714d92d2631c2ae889db7995f64a10ddec9ef5