icd: add icd_format_get_channel_count
diff --git a/icd/common/icd-format.h b/icd/common/icd-format.h
index ebf7d5d..5bb5dc9 100644
--- a/icd/common/icd-format.h
+++ b/icd/common/icd-format.h
@@ -91,6 +91,8 @@
     return (icd_format_is_compressed(format)) ? 4 : 1;
 }
 
-unsigned int icd_format_get_size(XGL_FORMAT format);
+XGL_SIZE icd_format_get_size(XGL_FORMAT format);
+
+XGL_UINT icd_format_get_channel_count(XGL_FORMAT format);
 
 #endif /* ICD_FORMAT_H */