gpio-name: document clean up and standardization

Some recent changes have gone against the grain on the initial document
layout. This was done so pin names could have more description
associated with them which makes sense. Change the document to get all
sections back to being consistent and add some descriptive text where needed.

Change-Id: Ib28c02e297cc24bcc01559c8af85f54ae04faf5b
Signed-off-by: Andrew Geissler <geissonator@yahoo.com>
diff --git a/designs/device-tree-gpio-naming.md b/designs/device-tree-gpio-naming.md
index 6f2504c..2abd1d0 100644
--- a/designs/device-tree-gpio-naming.md
+++ b/designs/device-tree-gpio-naming.md
@@ -39,7 +39,7 @@
 
 ## Proposed Design
 Below are the standard categories. The "Pattern" in each section describes the
-naming convention and then the "Defined" portion lists the common GPIO names to
+naming convention and then the sub bullets list the common GPIO names to
 be used (when available on an OpenBMC system). This naming convention must be
 followed for all common GPIO's.
 
@@ -50,23 +50,19 @@
 ### LEDs
 Pattern: `led-*`
 
-Defined:
-- led-fault
-- led-identify
-- led-power
-- led-sys-boot-status
-- led-attention
-- led-hdd-fault
-- led-rear-fault
-- led-rear-power
-- led-rear-id
+#### led-fault
+#### led-identify
+#### led-power
+#### led-sys-boot-status
+#### led-attention
+#### led-hdd-fault
+#### led-rear-fault
+#### led-rear-power
+#### led-rear-id
 
 ### Power and Regulators
 Pattern: `power-*`, `regulator-*`
 
-Defined:
-#### power-button
-
 #### power-chassis-control
 Set to initiate power-on or power-off of the chassis.
 
@@ -93,22 +89,16 @@
 ### Buttons
 Pattern: `*-button`
 
-Defined:
-- power-button
+#### power-button
 
 ### Presence
 Pattern: `presence-*`
 
-Defined:
-- presence-ps0
-- presence-ps1
-- ...
-- presence-ps`<N>`
+#### presence-ps0, presence-ps1, ..., presence-ps\<N>
 
 ### Secure Boot
 
 #### bmc-secure-boot
-
 Input pin that indicates that the BMC is configured to boot with security
 protections enforced.
 
@@ -118,7 +108,6 @@
 ### Special
 These are special case and/or grandfathered in pin names.
 
-Defined:
 #### air-water
 Indicates whether system is air or water cooled
 
@@ -133,9 +122,12 @@
 #### Special
 These are special case and/or grandfathered in pin names.
 
-Defined:
-- cfam-reset
-- checkstop
+##### cfam-reset
+Utilized to issue a processor logic reset to a IBM POWER processor.
+
+##### checkstop
+Utilized to indicate a IBM POWER processor has entered an unrecoverable error
+state.
 
 ## Alternatives Considered
 - Continue to hard code a config file per system type that has the