net: cosmetic: Clean up netconsole variables and functions

Make a thorough pass through all variables and function names contained
within netconsole.c and remove CamelCase and improve naming.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/net/net.c b/net/net.c
index 1133f79..1395276 100644
--- a/net/net.c
+++ b/net/net.c
@@ -417,7 +417,7 @@
 #endif
 #if defined (CONFIG_NETCONSOLE) && !(CONFIG_SPL_BUILD)
 		case NETCONS:
-			NcStart();
+			nc_start();
 			break;
 #endif
 #if defined(CONFIG_CMD_SNTP)