mailbox: qcom: Add MSM8939 APCS support

Enable MSM8939 APCS support by adding the compatible.  It reuses
msm8916_apcs_data.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
1 file changed