[media] atomisp: Unify lut free logic

ISP2401 introduced a helper for this which we can use just as well on the
ISP2400 and remove some more noise differences.
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>

drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css.c

@@ -2533,15 +2533,8 @@ ia_css_pipe_destroy(struct ia_css_pipe *pipe)
 		break;
 	}
 
-#ifndef ISP2401
-	if (pipe->scaler_pp_lut != mmgr_NULL) {
-		hmm_free(pipe->scaler_pp_lut);
-		pipe->scaler_pp_lut = mmgr_NULL;
-	}
-#else
 	sh_css_params_free_gdc_lut(pipe->scaler_pp_lut);
 	pipe->scaler_pp_lut = mmgr_NULL;
-#endif
 
 	my_css.active_pipes[ia_css_pipe_get_pipe_num(pipe)] = NULL;
 	sh_css_pipe_free_shading_table(pipe);

drivers/staging/media/atomisp/pci/atomisp2/css2400/sh_css_params.c

@@ -3356,15 +3356,8 @@ enum ia_css_err ia_css_pipe_set_bci_scaler_lut(struct ia_css_pipe *pipe,
 	}
 
 	/* Free any existing tables. */
-#ifndef ISP2401
-	if (pipe->scaler_pp_lut != mmgr_NULL) {
-		hmm_free(pipe->scaler_pp_lut);
-		pipe->scaler_pp_lut = mmgr_NULL;
-	}
-#else
 	sh_css_params_free_gdc_lut(pipe->scaler_pp_lut);
 	pipe->scaler_pp_lut = mmgr_NULL;
-#endif
 
 #ifndef ISP2401
 	if (store) {
@@ -3445,15 +3438,8 @@ void sh_css_params_free_default_gdc_lut(void)
 {
 	IA_CSS_ENTER_PRIVATE("void");
 
-#ifndef ISP2401
-	if (default_gdc_lut != mmgr_NULL) {
-		hmm_free(default_gdc_lut);
-		default_gdc_lut = mmgr_NULL;
-	}
-#else
 	sh_css_params_free_gdc_lut(default_gdc_lut);
 	default_gdc_lut = mmgr_NULL;
-#endif
 
 	IA_CSS_LEAVE_PRIVATE("void");