arm: imx6: Enable TCP, IPv6, wget on DH i.MX6 DHCOM

Enable support for TCP protocol, wget, and IPv6 on this platform.
The former two allow users download payload into the U-Boot from
a web server, which may be more convenient or easier to set up
than TFTP server. The later is enabled to future proof the IP
stack on this platform.

Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
diff --git a/configs/dh_imx6_defconfig b/configs/dh_imx6_defconfig
index 154131e..071898b 100644
--- a/configs/dh_imx6_defconfig
+++ b/configs/dh_imx6_defconfig
@@ -56,6 +56,9 @@
 CONFIG_CMD_USB=y
 CONFIG_CMD_USB_MASS_STORAGE=y
 CONFIG_CMD_WDT=y
+CONFIG_CMD_DHCP6=y
+CONFIG_CMD_TFTPPUT=y
+CONFIG_CMD_WGET=y
 CONFIG_CMD_BOOTCOUNT=y
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_TIME=y
@@ -72,6 +75,10 @@
 CONFIG_ETHPRIME="FEC"
 CONFIG_VERSION_VARIABLE=y
 CONFIG_ARP_TIMEOUT=200
+CONFIG_IP_DEFRAG=y
+CONFIG_TFTP_TSIZE=y
+CONFIG_PROT_TCP_SACK=y
+CONFIG_IPV6=y
 CONFIG_BOUNCE_BUFFER=y
 CONFIG_DWC_AHSATA=y
 CONFIG_LBA48=y