nft-qos: swap dependency order

nft-qos: swap dependency order

In preparation for generating nftables-no/json variants, swap dependency
order to prevent following recursive dependency warnings:

tmp/.config-package.in:73879:error: recursive dependency detected!
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
tmp/.config-package.in:73879:	symbol PACKAGE_luci-app-nft-qos depends on PACKAGE_luci-app-nft-qos
tmp/.config-package.in:854:error: recursive dependency detected!
For a resolution refer to Documentation/kbuild/kconfig-language.txt
subsection "Kconfig recursive dependency limitations"
tmp/.config-package.in:854:	symbol PACKAGE_nft-qos depends on PACKAGE_nft-qos

Signed-off-by: Kevin Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk>