realtek: enhance & harmonize dsa/phy max port patches

realtek: enhance & harmonize dsa/phy max port patches

DSA silently drops internal phy access to ports >= 32 in dsa_user_phy_read()
and dsa_user_phy_write(). The code shows:

static int dsa_user_phy_read(struct mii_bus *bus, int addr, int reg)
{
	struct dsa_switch *ds = bus->priv;

	if (ds->phys_mii_mask & (1 << addr))
		return ds->ops->phy_read(ds, addr, reg);

	return 0xffff;
}

With ds->phys_mii_mask being a 32 bit variable the reason is clear. So do
not only increase the max values but also adapt the needed bitmasks in
the dsa and phy code. This fixes the dsa_user_ports() and dsa_cpu_ports()
too.

While we are here combine the old separated patches because dsa, mdio and
phy are tigthly coupled.

Signed-off-by: Markus Stockhausen <markus.stockhausen@gmx.de>
Link: https://github.com/openwrt/openwrt/pull/18846
Signed-off-by: Robert Marko <robimarko@gmail.com>