[PATCH] dhcp: add missing define

[Robert Schwebel]

Without this, we get

commands/dhcp.c: In function 'do_dhcp':
commands/dhcp.c:22:16: error: 'DHCP_DEFAULT_RETRY' undeclared (first use in this function)
  int retries = DHCP_DEFAULT_RETRY;
                ^
commands/dhcp.c:22:16: note: each undeclared identifier is reported only once for each function it appears in
scripts/Makefile.build:249: recipe for target 'commands/dhcp.o' failed

Signed-off-by: Robert Schwebel <r.schwebel at pengutronix.de>
---
 commands/dhcp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/commands/dhcp.c b/commands/dhcp.c
index eb98bfc..0358a4c 100644
--- a/commands/dhcp.c
+++ b/commands/dhcp.c
@@ -16,6 +16,8 @@
 #include <getopt.h>
 #include <dhcp.h>
 
+#define DHCP_DEFAULT_RETRY 20
+
 static int do_dhcp(int argc, char *argv[])
 {
 	int ret, opt;
-- 
2.1.4