hwc: Enable orientation event for all targets

 * This is useful all targets, so remove the QCOM ifdef.

Change-Id: I6c1f517b9bc1f11266817883bf2c5ca7c497c5b7
libhardware: allow all platforms to disable external rotation

Change-Id: Ifa70b4232e5822936074f1272dce5498be471c9d