egl: add and enable EGL_KHR_config_attribs

Extension is already implemented in the main code.

Signed-off-by: Emil Velikov <emil.velikov@collabora.com>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
diff --git a/src/egl/main/eglapi.c b/src/egl/main/eglapi.c
index 1716ffa..33d5620 100644
--- a/src/egl/main/eglapi.c
+++ b/src/egl/main/eglapi.c
@@ -485,6 +485,7 @@
    _EGL_CHECK_EXTENSION(EXT_swap_buffers_with_damage);
 
    _EGL_CHECK_EXTENSION(KHR_cl_event2);
+   _EGL_CHECK_EXTENSION(KHR_config_attribs);
    _EGL_CHECK_EXTENSION(KHR_create_context);
    _EGL_CHECK_EXTENSION(KHR_fence_sync);
    _EGL_CHECK_EXTENSION(KHR_get_all_proc_addresses);
@@ -597,6 +598,11 @@
        */
       disp->Extensions.KHR_get_all_proc_addresses = EGL_TRUE;
 
+      /* Extensions is used to provide EGL 1.3 functionality for 1.2 aware
+       * programs. It is driver agnostic and handled in the main EGL code.
+       */
+      disp->Extensions.KHR_config_attribs = EGL_TRUE;
+
       _eglComputeVersion(disp);
       _eglCreateExtensionsString(disp);
       _eglCreateAPIsString(disp);
diff --git a/src/egl/main/egldisplay.h b/src/egl/main/egldisplay.h
index 4e0d717..6c1049d 100644
--- a/src/egl/main/egldisplay.h
+++ b/src/egl/main/egldisplay.h
@@ -105,6 +105,7 @@
    EGLBoolean EXT_swap_buffers_with_damage;
 
    EGLBoolean KHR_cl_event2;
+   EGLBoolean KHR_config_attribs;
    EGLBoolean KHR_create_context;
    EGLBoolean KHR_fence_sync;
    EGLBoolean KHR_get_all_proc_addresses;