drm/i915/gt: Correct kerneldoc for intel_gt_mcr_wait_for_reg()

The kerneldoc function name was not updated when this function was
converted to a non-fw form.

Fixes: 192bb40 ("drm/i915/gt: Manage uncore->lock while waiting on MCR register")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Reviewed-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20221128233014.4000136-2-matthew.d.roper@intel.com

drivers/gpu/drm/i915/gt/intel_gt_mcr.c

@@ -702,7 +702,7 @@ void intel_gt_mcr_get_ss_steering(struct intel_gt *gt, unsigned int dss,
 }
 
 /**
- * intel_gt_mcr_wait_for_reg_fw - wait until MCR register matches expected state
+ * intel_gt_mcr_wait_for_reg - wait until MCR register matches expected state
  * @gt: GT structure
  * @reg: the register to read
  * @mask: mask to apply to register value