airoha: an7581: w1700k: fix RTL8261N PHY boot failure with increased reset timing

airoha: an7581: w1700k: fix RTL8261N PHY boot failure with increased reset timing

Some W1700K and XR1701G boards with Realtek RTL8261N/RTL8261BE 10G PHYs
fail to bring up the USXGMII link on cold boot. The PHY enters a bad
state during initialization and the link stays down permanently until
power cycle.

Root cause: the GPIO reset assert/deassert timing (40ms/150ms) is too
short for the RTL8261N to complete its internal firmware load. The OEM
firmware uses 200ms/200ms.

Increase both PHY reset timings to 200ms/200ms to match OEM values.
Confirmed to fix intermittent boot failures on both W1700K (Gemtek)
and XR1701G boards.

Signed-off-by: Ryan Chen <rchen14b@gmail.com>
Link: https://github.com/openwrt/openwrt/pull/22564
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>