soc: qcom: Select MSM_PIL for SUBSYSTEM_RESTART

SUBSYSTEM_RESTART requires MSM_PIL and since SUBSYSTEM_RESTART is very
popular among other leaf drivers it makes sense to just go ahead and
select MSM_PIL instead of forcing us to always have both enabled in
the defconfig.

Change-Id: Ic0dedbade274a072a8829af392a98deb2c4db791
Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>