render: add wlr_egl_create_from_drm_fd function

This function relies on the extension EGL_WL_bind_wayland_display being
present. If not, the creation of `wlr_egl` will fallback on using GBM

include/render/egl.h

@@ -0,0 +1,15 @@
+#ifndef RENDER_EGL_H
+#define RENDER_EGL_H
+
+#include <wlr/render/egl.h>
+
+/**
+ * Creates and EGL context from a given drm fd. This function uses the
+ * following extensions:
+ * - EXT_device_enumeration to get the list of available EGLDeviceEXT
+ * - EXT_device_drm to get the name of the EGLDeviceEXT
+ * - EXT_platform_device to create an EGLDisplay from an EGLDeviceEXT
+ */
+struct wlr_egl *wlr_egl_create_from_drm_fd(int drm_fd);
+
+#endif