drm_hwcomposer: Replace LOG_TAG with drmhwc

It's a pain to use logcat filters for drm_hwcomposer since each file has a different tag necessitating one to specify each tag for the logcat filter or use a regex.

Use one tag for all of drm_hwcomposer to simplify this.

Signed-off-by: Sean Paul <seanpaul@chromium.org>
diff --git a/hwc2_device/HwcDisplay.cpp b/hwc2_device/HwcDisplay.cpp
index 6f08c33..89a8c3f 100644
--- a/hwc2_device/HwcDisplay.cpp
+++ b/hwc2_device/HwcDisplay.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#define LOG_TAG "hwc-display"
+#define LOG_TAG "drmhwc"
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
 
 #include "HwcDisplay.h"