drm/i915/guc/rc: Use i915_probe_error instead of drm_error

To avoid false positives in error injection cases.

Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Signed-off-by: John Harrison <John.C.Harrison@Intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220506054142.5025-1-vinay.belgaumkar@intel.com