Backport ir-receiver/minipcie/poweroff/spi/usb-c support and other
minor fixes for the NanoPC T6 board.
Signed-off-by: Tianling Shen <cnsztl@immortalwrt.org>
Link: https://github.com/openwrt/openwrt/pull/16443
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>