udhcpc: code shrink

function                                             old     new   delta
perform_release                                      112     172     +60
send_release                                          81       -     -81
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 1/0 up/down: 60/-81)            Total: -21 bytes

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c
index d2f1659..4b23e4d 100644
--- a/networking/udhcp/dhcpc.c
+++ b/networking/udhcp/dhcpc.c
@@ -850,7 +850,9 @@
 #endif
 
 /* Unicast a DHCP release message */
-static int send_release(uint32_t server, uint32_t ciaddr)
+static
+ALWAYS_INLINE /* one caller, help compiler to use this fact */
+int send_release(uint32_t server, uint32_t ciaddr)
 {
 	struct dhcp_packet packet;