ARM: dts: msm: Configure safety-timer to 384mins for SKUK

Safety-timer in minutes means the time a single charge cycle
may last. Change it to 384mins based on charging efficiency and
battery spec.

Change-Id: I33eff20864f8f40482caebd84f914dd2031423bd
Signed-off-by: Zhenhua Huang <zhenhuah@codeaurora.org>