config: arm64: msm: Enable NETFILTER_XT_TARGET_HARDIDLETIMER

For fast dormancy/tcm feature, network idle timer support is required
where in timer expires even in power colapse and which triggers a
sysfs notification. If a matching packet is received then timer is
reset. This support is required in the kernel so enabling the config

Change-Id: I9b8d2fae1d51c049c80b6081cf747d4559247e2e
Signed-off-by: Ravinder Konka <rkonka@codeaurora.org>