defconfig: msm8916: Enable FREE_PAGES_RDONLY and FORCE_PAGES

Enable the configs to debug scribbling of drivers
on free pages. This is intended to be used as
a debugging feature and should NOT be used for
performance testing.

Change-Id: Ifae838b33df17440e72165f050a8015329a5237b
Signed-off-by: Susheel Khiani <skhiani@codeaurora.org>