Relocate power HAL from device/qcom/common

Split module from combined device/qcom/common project into its
own project.

Relocation of some files from device/qcom/common at
b5ce80cb1f60759a142a9338104d3adf3303ec0c.

Change-Id: I6c13729a822f6fb9b5574b759ae9ec12154be464
diff --git a/utils.h b/utils.h
new file mode 100644
index 0000000..4c3dc7f
--- /dev/null
+++ b/utils.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (c) 2012-2013,2015-2017, The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ * *    * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ *       copyright notice, this list of conditions and the following
+ *       disclaimer in the documentation and/or other materials provided
+ *       with the distribution.
+ *     * Neither the name of The Linux Foundation nor the names of its
+ *       contributors may be used to endorse or promote products derived
+ *       from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <cutils/properties.h>
+
+int sysfs_read(char *path, char *s, int num_bytes);
+int sysfs_write(char *path, char *s);
+int get_scaling_governor(char governor[], int size);
+int get_scaling_governor_check_cores(char governor[], int size,int core_num);
+int is_interactive_governor(char*);
+
+void vote_ondemand_io_busy_off();
+void unvote_ondemand_io_busy_off();
+void vote_ondemand_sdf_low();
+void unvote_ondemand_sdf_low();
+void perform_hint_action(int hint_id, int resource_values[],
+    int num_resources);
+void undo_hint_action(int hint_id);
+void release_request(int lock_handle);
+int interaction_with_handle(int lock_handle, int duration, int num_args, int opt_list[]);
+int perf_hint_enable(int hint_id, int duration);