drm/xe/guc: Add capture size check in GuC log buffer

Capture-nodes generated by GuC are placed in the GuC capture ring
buffer which is a sub-region of the larger Guc-Log-buffer.
Add capture output size check before allocating the shared buffer.

Signed-off-by: Zhanjun Dong <zhanjun.dong@intel.com>
Reviewed-by: Alan Previn <alan.previn.teres.alexis@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241004193428.3311145-4-zhanjun.dong@intel.com