fix up dri driverName to select the lima driver

The binary driver is unaffected by it, only when mesa-dri is fully
installed does it do something.
Signed-off-by: Luc Verhaegen <libv@skynet.be>

src/sunxi_mali_ump_dri2.c

@@ -1035,7 +1035,7 @@ SunxiMaliDRI2 *SunxiMaliDRI2_Init(ScreenPtr pScreen,
 
     info.version = 3;
 
-    info.driverName = "sunxi-mali";
+    info.driverName = "lima";
     info.deviceName = "/dev/dri/card0";
     info.fd = drm_fd;