defconfig: lahaina: Expose additional page debugging info

Enable CONFIG_PAGE_EXTENSION_PAGE_FREE and CONFIG_PAGE_FREE_TIME, which
provides information on (1) if a page from buddy is free or not, (2) the
timestamp of when a given page was freed, if it currently is free.

Change-Id: I702c93192e031bbeb023879e47c2202f0c8d65f9
Signed-off-by: Chris Goldsworthy <cgoldswo@codeaurora.org>