drm/msm/dpu: remove NULL-ness check in dpu_hw_intr_destroy

There is no need to check that kfree() argument is not NULL. Remove
extra check and call kfree() unconditionally.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20220507114009.1696278-1-dmitry.baryshkov@linaro.orgSigned-off-by: Rob Clark <robdclark@chromium.org>

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

@@ -432,8 +432,7 @@ struct dpu_hw_intr *dpu_hw_intr_init(void __iomem *addr,
 
 void dpu_hw_intr_destroy(struct dpu_hw_intr *intr)
 {
-	if (intr)
-		kfree(intr);
+	kfree(intr);
 }
 
 int dpu_core_irq_register_callback(struct dpu_kms *dpu_kms, int irq_idx,