sm6375-common: libqti-perfd-client: Move to C

* Why bothering with C++ mangling when we can just build it as a standard C library?

Change-Id: I45ea977edf7ea7fab6fece76f3049654a8d24c5d

libqti-perfd-client/client.c

@@ -0,0 +1,24 @@
+#define LOG_TAG "libqti-perfd-client"
+
+#include <stdint.h>
+#include <log/log.h>
+
+void perf_get_feedback() {}
+void perf_hint() {}
+int perf_lock_acq(int handle, int duration, int arg3[], int arg4) {
+    ALOGI("perf_lock_acq: handle: %d, duration: %d, arg3[0]: %d, arg4: %d",
+            handle, duration, arg3[0], arg4);
+    if (handle > 0)
+        return handle;
+
+    return 233;
+}
+void perf_lock_cmd() {}
+int perf_lock_rel(int handle) {
+    ALOGI("perf_lock_rel: handle: %d", handle);
+    if (handle > 0)
+        return handle;
+
+    return 233;
+}
+void perf_lock_use_profile() {}