HiKey/HiKey960: Rework HiKey PowerHAL to use power@1.1 interface

This reworks the old power.hikey[960].so poewrHAL library to
implement the power@1.1-service interface.

Much of this change is taken from the marlin implementation.

Change-Id: I7cc4068a28dfb48348b18024b00ff53526e189af
Signed-off-by: John Stultz <john.stultz@linaro.org>
diff --git a/sepolicy/file_contexts b/sepolicy/file_contexts
index dacdb9f..52a29e5 100644
--- a/sepolicy/file_contexts
+++ b/sepolicy/file_contexts
@@ -34,6 +34,8 @@
 /dev/block/platform/soc/f723d000\.dwmmc0/by-name/userdata u:object_r:userdata_block_device:s0
 
 
+/vendor/bin/hw/android\.hardware\.power@1\.1-service\.hikey-common          u:object_r:hal_power_default_exec:s0
+
 /vendor/lib(64)?/libRSDriverArm\.so u:object_r:same_process_hal_file:s0
 /vendor/lib64/libbccArm\.so u:object_r:same_process_hal_file:s0
 /vendor/lib64/libbcc\.so u:object_r:same_process_hal_file:s0