drm/bridge: imx8qxp-pxl2dpi: Fix NULL pointer dereference in imx8qxp_pxl2dpi_bridge_d...

drm/bridge: imx8qxp-pxl2dpi: Fix NULL pointer dereference in imx8qxp_pxl2dpi_bridge_destroy()

Pointer bridge->driver_private in imx8qxp_pxl2dpi_bridge_destroy()
is NULL when imx8qxp_pxl2dpi_bridge_probe() returns error, because
the pointer is initialized only when imx8qxp_pxl2dpi_bridge_probe()
returns 0.  The NULL pointer would be set to pointer p2d and then
NULL pointer p2d would be dereferenced.  Fix this by returning early
from imx8qxp_pxl2dpi_bridge_destroy() if !p2d is true.

Fixes: 900699ba830f ("drm/bridge: imx8qxp-pxl2dpi: get/put the companion bridge")
Signed-off-by: Liu Ying <victor.liu@nxp.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260123-imx8qxp-drm-bridge-fixes-v1-2-8bb85ada5866@nxp.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>