hwc2: fix for accessing right buffer variable name

with improper usage of buffer variable name histogram values
are not calculated

Change-Id: I278a250c4b0e0da9204f159822099cbb17470aef
CRs-Fixed: 2057490
diff --git a/sdm/libs/hwc2/hwc_display_primary.cpp b/sdm/libs/hwc2/hwc_display_primary.cpp
index 2fcf2a9..b82a46e 100644
--- a/sdm/libs/hwc2/hwc_display_primary.cpp
+++ b/sdm/libs/hwc2/hwc_display_primary.cpp
@@ -521,12 +521,12 @@
   GetPanelResolution(&panel_width, &panel_height);
   GetFrameBufferResolution(&fb_width, &fb_height);
 
-  if (post_processed_output && (output_buffer_info_.buffer_config.width < panel_width ||
-                                output_buffer_info_.buffer_config.height < panel_height)) {
+  if (post_processed_output && (output_buffer_info.buffer_config.width < panel_width ||
+                                output_buffer_info.buffer_config.height < panel_height)) {
     DLOGE("Buffer dimensions should not be less than panel resolution");
     return -1;
-  } else if (!post_processed_output && (output_buffer_info_.buffer_config.width < fb_width ||
-                                        output_buffer_info_.buffer_config.height < fb_height)) {
+  } else if (!post_processed_output && (output_buffer_info.buffer_config.width < fb_width ||
+                                        output_buffer_info.buffer_config.height < fb_height)) {
     DLOGE("Buffer dimensions should not be less than FB resolution");
     return -1;
   }