arm64: defconfig: enable autosleep and wakelock configs

SVM going to rely on kernel autosleep feature to do suspend-to-RAM.
Enable required configurations to achieve suspend-to-RAM functionality.

Change-Id: Ie31abce7927c8b6b2ce5dad6f917f96c52e90803
Signed-off-by: Murali Nalajala <mnalajal@codeaurora.org>