net: cosmetic: Fixup var names for DHCP strings

Remove CamelCase variable naming.
Move the definition to the same compilation unit as the primary use.

Signed-off-by: Joe Hershberger <joe.hershberger@ni.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/include/net.h b/include/net.h
index c16744a..494930c 100644
--- a/include/net.h
+++ b/include/net.h
@@ -473,9 +473,9 @@
 /* Our 2nd Domain Name Server (0 = unknown) */
 extern struct in_addr net_dns_server2;
 #endif
-extern char	NetOurNISDomain[32];	/* Our NIS domain */
-extern char	NetOurHostName[32];	/* Our hostname */
-extern char	NetOurRootPath[64];	/* Our root path */
+extern char	net_nis_domain[32];	/* Our IS domain */
+extern char	net_hostname[32];	/* Our hostname */
+extern char	net_root_path[64];	/* Our root path */
 /** END OF BOOTP EXTENTIONS **/
 extern uchar		NetOurEther[6];		/* Our ethernet address */
 extern uchar		NetServerEther[6];	/* Boot server enet address */