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/drm/DrmAtomicStateManager.cpp b/drm/DrmAtomicStateManager.cpp
index b1f8257..537f819 100644
--- a/drm/DrmAtomicStateManager.cpp
+++ b/drm/DrmAtomicStateManager.cpp
@@ -17,7 +17,7 @@
 #undef NDEBUG /* Required for assert to work */
 
 #define ATRACE_TAG ATRACE_TAG_GRAPHICS
-#define LOG_TAG "hwc-drm-atomic-state-manager"
+#define LOG_TAG "drmhwc"
 
 #include "DrmAtomicStateManager.h"