docs: vendor-ibm-astlpc: Style code snippets as C

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: I95a31775cef4f54e37a94cde5185493d3427f586
diff --git a/docs/bindings/vendor-ibm-astlpc.md b/docs/bindings/vendor-ibm-astlpc.md
index b695d12..e7df566 100644
--- a/docs/bindings/vendor-ibm-astlpc.md
+++ b/docs/bindings/vendor-ibm-astlpc.md
@@ -171,7 +171,7 @@
 Full definition of the control area is defined below, and it will be the base
 for all future versions.
 
-```
+```c
 struct mctp_lpcmap_hdr {
    uint32_t magic;
 
@@ -192,7 +192,7 @@
 Where the magic value marking the beginning of the control area is the ASCII
 encoding of "MCTP":
 
-```
+```c
 #define LPC_MAGIC 0x4d435450
 ```