We will need "mktplinkfw-combined" command also in the "ramips" target
for new MediaTek based TP-Link devices, with "safeloader" image type.
Also, rename the command to "tplink-v1-header", use "VERSION_DIST"
variable instead of "OpenWrt" and allow passing additional parameters.
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>