rusticl/mesa/screen,device: add driver_name

Signed-off-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24839>

src/gallium/frontends/rusticl/mesa/pipe/device.rs

@@ -24,6 +24,10 @@ impl PipeLoaderDevice {
         let s = unsafe { pipe_loader_create_screen(self.ldev) };
         PipeScreen::new(self, s)
     }
+
+    pub fn driver_name(&self) -> String {
+        c_string_to_string(unsafe { *self.ldev }.driver_name)
+    }
 }
 
 impl Drop for PipeLoaderDevice {

src/gallium/frontends/rusticl/mesa/pipe/screen.rs

@@ -240,6 +240,10 @@ impl PipeScreen {
         }
     }
 
+    pub fn driver_name(&self) -> String {
+        self.ldev.driver_name()
+    }
+
     pub fn name(&self) -> String {
         unsafe {
             let s = *self.screen;