goldfish: enable kernel preemption(CONFIG_PREEMPT) for ARM and Mips

- it is already enabled for x86

Change-Id: Ic33c27af19613e4ebc237eb337f3a24f93954e0c
Signed-off-by: keunyoung <keunyoung@google.com>
Merge branch 'android-goldfish-3.4' of https://android.googlesource.com/kernel/goldfish into HEAD
cm: goldfish: enable kernel preemption