egl_dri2: Export dri2_get_driver_for_fd

src/egl/drivers/dri2/egl_dri2.h

@@ -136,4 +136,7 @@ dri2_initialize_x11(_EGLDriver *drv, _EGLDisplay *disp);
 EGLBoolean
 dri2_initialize_drm(_EGLDriver *drv, _EGLDisplay *disp);
 
+char *
+dri2_get_driver_for_fd(int fd);
+
 #endif /* EGL_DRI2_INCLUDED */

src/egl/drivers/dri2/platform_drm.c

@@ -567,7 +567,7 @@ const struct dri2_driver_map driver_map[] = {
    { 0x1002, "r600", r600_chip_ids, ARRAY_SIZE(r600_chip_ids) },
 };
 
-static char *
+char *
 dri2_get_driver_for_fd(int fd)
 {
    struct udev *udev;