OpenGL: Moving comment to the right place

Test: Ensure Pixel4XL boot and driver loaded.
      This does not have any functional change.
Bug: b/147019446

Change-Id: I8bbdb223e9f6d882e4d1b8cfd7a630f147e5c2d7
diff --git a/opengl/libs/EGL/egl.cpp b/opengl/libs/EGL/egl.cpp
index 768d3b5..2e183b3 100644
--- a/opengl/libs/EGL/egl.cpp
+++ b/opengl/libs/EGL/egl.cpp
@@ -172,10 +172,6 @@
 
 // ----------------------------------------------------------------------------
 
-// this mutex protects:
-//    d->disp[]
-//    egl_init_drivers_locked()
-//
 static EGLBoolean egl_init_drivers_locked() {
     if (sEarlyInitState) {
         // initialized by static ctor. should be set here.
@@ -211,6 +207,8 @@
     return loader.load_glesv1_driver(cnx);
 }
 
+// this mutex protects driver load logic as a critical section since it accesses to global variable
+// like gEGLImpl
 static pthread_mutex_t sInitDriverMutex = PTHREAD_MUTEX_INITIALIZER;
 
 EGLBoolean egl_init_drivers() {