The firmware partition name is specifc to ipTIME NAS1dual and should not be
set globally.
Fixes: #16148
Fixes: 6ff970bb51 ("mvebu: add support for ipTIME NAS1dual")
Signed-off-by: Boris Krasnovskiy <borkra@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/16690
Signed-off-by: Robert Marko <robimarko@gmail.com>