drm/i915/guc: Drop redundant ctx param from kerneldoc

drivers/gpu/drm/i915/intel_guc_submission.c:799: warning: Excess function parameter 'ctx' description in 'guc_client_alloc'
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Reviewed-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190711162415.2938-1-chris@chris-wilson.co.uk

drivers/gpu/drm/i915/intel_guc_submission.c

@@ -789,8 +789,6 @@ static bool guc_verify_doorbells(struct intel_guc *guc)
  *		The kernel client to replace ExecList submission is created with
  *		NORMAL priority. Priority of a client for scheduler can be HIGH,
  *		while a preemption context can use CRITICAL.
- * @ctx:	the context that owns the client (we use the default render
- *		context)
  *
  * Return:	An intel_guc_client object if success, else NULL.
  */