net: cosmetic: Clean up DHCP variables and functions

Make a thorough pass through all variables and function names contained
within bootp.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/bootp.h b/net/bootp.h
index 8c591a6..efc2100 100644
--- a/net/bootp.h
+++ b/net/bootp.h
@@ -29,7 +29,7 @@
 #define OPT_FIELD_SIZE 64
 #endif
 
-struct Bootp_t {
+struct bootp_hdr {
 	uchar		bp_op;		/* Operation			*/
 # define OP_BOOTREQUEST	1
 # define OP_BOOTREPLY	2
@@ -51,7 +51,7 @@
 	char		bp_vend[OPT_FIELD_SIZE]; /* Vendor information	*/
 };
 
-#define BOOTP_HDR_SIZE	sizeof(struct Bootp_t)
+#define BOOTP_HDR_SIZE	sizeof(struct bootp_hdr)
 
 /**********************************************************************/
 /*
@@ -59,16 +59,16 @@
  */
 
 /* bootp.c */
-extern ulong	BootpID;		/* ID of cur BOOTP request	*/
-extern int	BootpTry;
+extern ulong	bootp_id;		/* ID of cur BOOTP request	*/
+extern int	bootp_try;
 
 
 /* Send a BOOTP request */
-extern void BootpReset(void);
-extern void BootpRequest(void);
+void bootp_reset(void);
+void bootp_request(void);
 
 /****************** DHCP Support *********************/
-extern void DhcpRequest(void);
+void dhcp_request(void);
 
 /* DHCP States */
 typedef enum { INIT,