dri: Check buffer height and avoid overflow

The dri2_allocate_buffer() can be called with arbitrary height, however
the struct pipe_resource .height0 member is uint16_t. Check height for
maximum size to avoid overflow. Note that .width0 is unsigned int, so
it does not have the same issue.

The uint16 limit comes from commit:
e6428092f5 ("gallium: decrease the size of pipe_resource - 64 -> 48 bytes")

The overflow can be triggered e.g. by requesting large BO:
```
gbm_bo_create(dev, 1, 640*480*4, GBM_FORMAT_R8, GBM_BO_USE_LINEAR);
```

Signed-off-by: Marek Vasut <marex@denx.de>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/16513>

src/gallium/frontends/dri/dri2.c

@@ -304,6 +304,10 @@ dri2_allocate_buffer(__DRIscreen *sPriv,
    unsigned bind = 0;
    struct winsys_handle whandle;
 
+   /* struct pipe_resource height0 is 16-bit, avoid overflow */
+   if (height > 0xffff)
+      return NULL;
+
    switch (attachment) {
       case __DRI_BUFFER_FRONT_LEFT:
       case __DRI_BUFFER_FAKE_FRONT_LEFT: