drm/tiny/bochs: Convert dev_err() to drm_err()

The DRM subsystem has a set of preferred, prefixed logging functions
(drm_info, drm_warn, drm_err) which improve debuggability by including
the driver and function name in the log output.

As part of the ongoing effort to modernize logging calls,
convert a dev_err() call in the bochs hardware initialization
function to its drm_err() equivalent.

This work was suggested by the DRM TODO list.

Signed-off-by: Leander Kieweg <kieweg.leander@gmail.com>
Reviewed-by: Thomas Zimmermann <tzimmermann@suse.de>
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Link: https://lore.kernel.org/r/20250818113530.187440-1-kieweg.leander@gmail.com

Author: Leander Kieweg

drivers/gpu/drm/tiny/bochs.c

@@ -252,7 +252,7 @@ static int bochs_hw_init(struct bochs_device *bochs)
 		}
 		bochs->ioports = 1;
 	} else {
-		dev_err(dev->dev, "I/O ports are not supported\n");
+		drm_err(dev, "I/O ports are not supported\n");
 		return -EIO;
 	}