drm/xe/uc: Fix missing unwind goto

drm/xe/uc: Fix missing unwind goto

Fix missing unwind goto on error handling.

Fixes: b2c4ac219fa4 ("drm/xe/uc: Disable GuC communication on hardware initialization error")
Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://lore.kernel.org/r/20250721214520.954014-1-zhanjun.dong@intel.com
(cherry picked from commit 176f44a5ec0b074aaf44852db77d0c183c36696d)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>