drm/bridge: dw-mipi-dsi: Fix bridge leak when host attach fails

drm/bridge: dw-mipi-dsi: Fix bridge leak when host attach fails

dw_mipi_dsi_host_attach() and dw_mipi_dsi2_host_attach() call
drm_bridge_add() before pdata->host_ops->attach(). If attach fails,
the bridge stayed registered without drm_bridge_remove(), leaking the
bridge reference and leaving the device on the global bridge list.

Fixes: 90910a651123 ("drm/bridge/synopsys: dsi: add ability to have glue-specific attach and detach")
Fixes: 0d6d86253fef ("drm/bridge/synopsys: Add MIPI DSI2 host controller bridge")
Signed-off-by: Osama Abdelkader <osama.abdelkader@gmail.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Link: https://patch.msgid.link/20260403145208.15890-1-osama.abdelkader@gmail.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>