ARM: msm: 8916: Kconfig: enable rpm-stats and rpm log

Rpm-stats would provide system wide sleep info and rpm-log
would provide rpm activity.
Enable rpm-stats and rpm-log by default.

Change-Id: I9dfe51a4e1b7bf82f9ed30151f2ffa5e3d0a294b
Signed-off-by: Anji Jonnala <anjir@codeaurora.org>