net: Add Kconfig option for BOOTP_NTPSERVER

Add a Kconfig option for BOOTP_NTPSERVER to enable the DHCP/BOOTP option
to configure the sntp server address.

Signed-off-by: Chris Packham <judge.packham@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
diff --git a/configs/devkit8000_defconfig b/configs/devkit8000_defconfig
index defed2d..4a096b9 100644
--- a/configs/devkit8000_defconfig
+++ b/configs/devkit8000_defconfig
@@ -18,6 +18,7 @@
 CONFIG_CMD_NAND=y
 CONFIG_CMD_NAND_LOCK_UNLOCK=y
 # CONFIG_CMD_SETEXPR is not set
+CONFIG_BOOTP_NTPSERVER=y
 CONFIG_CMD_JFFS2=y
 CONFIG_CMD_MTDPARTS=y
 CONFIG_MTDIDS_DEFAULT="nand0=nand"