drm/msm: Add missing struct identifier

fix warnings reported by make W=1
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c:195: warning: cannot
understand function prototype: 'const struct dpu_intr_reg
dpu_intr_set[] = '
drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c:252: warning: cannot
understand function prototype: 'const struct dpu_irq_type
dpu_irq_map[] = '

Signed-off-by: Tian Tao <tiantao6@hisilicon.com>
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_interrupts.c

@@ -190,7 +190,7 @@ struct dpu_irq_type {
 };
 
 /**
- * List of DPU interrupt registers
+ * struct dpu_intr_reg -  List of DPU interrupt registers
  */
 static const struct dpu_intr_reg dpu_intr_set[] = {
 	{
@@ -246,8 +246,9 @@ static const struct dpu_intr_reg dpu_intr_set[] = {
 };
 
 /**
- * IRQ mapping table - use for lookup an irq_idx in this table that have
- *                     a matching interface type and instance index.
+ * struct dpu_irq_type - IRQ mapping table use for lookup an irq_idx in this
+ *			 table that have a matching interface type and
+ *			 instance index.
  */
 static const struct dpu_irq_type dpu_irq_map[] = {
 	/* BEGIN MAP_RANGE: 0-31, INTR */