eth: asix88179: Fix ASIX AX88179A PHY hang

eth: asix88179: Fix ASIX AX88179A PHY hang

The ASIX AX88179A locks up when the ADVERTISE_NPAGE bit is set in the
MII_ADVERTISE register, suggesting that this feature may be broken or
unsupported on this chip. In the Linux kernel, this bit is not set,
and enabling it also causes the PHY to lock up and stay in a
link-down state.

Additionally, the AX88179 and AX88179A variants do not appear to
support the ADVERTISE_LPACK bit, as setting it consistently reads
back as 0.

This patch removes the ADVERTISE_NPAGE and ADVERTISE_LPACK bits from
the MII_ADVERTISE register configuration. It also resets the PHY
before modifying the MII_ADVERTISE register, then restarts
auto-negotiation, following the same flow used in the U-Boot asix.c
driver.

Signed-off-by: Khoa Hoang <admin@khoahoang.com>
Reviewed-by: Marek Vasut <marex@denx.de>