hw/xfree86: Fix -Wincompatible-pointer-types sbus compile failureHEADmaster

```
../hw/xfree86/common/xf86sbusBus.c: In function ‘xf86SbusConfigureNewDev’:
../hw/xfree86/common/xf86sbusBus.c:751:21: error: passing argument 1 of ‘XNFasprintf’ from incompatible pointer type [-Wincompatible-pointer-types]
  751 |         XNFasprintf(&GDev->busID, "SBUS:%s", promPath);
      |                     ^~~~~~~~~~~~
      |                     |
      |                     const char **
```

Apply the same fix as in commit e1e01d2e3 ("xfree86/common: Warning
fixes. Mostly const string handling.")

Part-of: <https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1751>

0 files changed, 0 insertions, 0 deletions