docs: vendor-ibm-astlpc: Remove intimidating header wording

Given the state of the rest of the document, stop trying to be super
formal.

Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
Change-Id: Ibdff4bdbc927cfcb77a691344748ac384c039641
diff --git a/docs/bindings/vendor-ibm-astlpc.md b/docs/bindings/vendor-ibm-astlpc.md
index 73387ca..9903b9c 100644
--- a/docs/bindings/vendor-ibm-astlpc.md
+++ b/docs/bindings/vendor-ibm-astlpc.md
@@ -5,7 +5,7 @@
 This design provides an efficient method to transfer MCTP packets between the
 host and BMC over the LPC bus on ASPEED BMC platforms.
 
-## Normative References
+## References
 
 The following referenced documents are indispensable for the application of
 this document.
@@ -21,7 +21,7 @@
 Revision 1.1 February 20, 2002,
 http://download.intel.com/design/servers/ipmi/IPMIv1_5rev1_1.pdf
 
-## Terms and Definitions
+## Definitions
 
 ### Baseline Transmission Unit (BTU)