[doc] updated content for mdbook-doxygen

Signed-off-by: Hugo McNally <hugo.mcnally@gmail.com>
diff --git a/hw/ip/sram_ctrl/README.md b/hw/ip/sram_ctrl/README.md
index 3ba81dd..4aa550b 100644
--- a/hw/ip/sram_ctrl/README.md
+++ b/hw/ip/sram_ctrl/README.md
@@ -227,7 +227,7 @@
 
 ## Device Interface Functions (DIFs)
 
-{{< dif_listing "sw/device/lib/dif/dif_sram_ctrl.h" >}}
+- [Device Interface Functions](../../../sw/device/lib/dif/dif_sram_ctrl.h)
 
 ## Register Table