realtek: dsa: rtl83xx: fix init section mismatch

realtek: dsa: rtl83xx: fix init section mismatch

Compilation currently spits this message:

WARNING: modpost: vmlinux: section mismatch in reference:
rtl83xx_sw_probe+0x6a4 (section: .text.rtl83xx_sw_probe)
-> rtl83xx_setup_qos (section: .init.text)

That means that we have a "normal" function caller (can be
called during the whole uptime) and a "initialization" function
callee (only available during init.

Fix this and directly fix the unwanted family checks.

Fixes: a91c3ab ("realtek: dsa: avoid use-after-free")
Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/21690
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>