KSZ9896 EEE is not disabled

[daisukes]

I have been using Jetson Mate, which has a KSZ9896 chip configured by the i2c driver.
I recently updated the driver for Linux kernel 5.10 but had problems with link drops.

According to the errata page 3, Energy Efficient Ethernet (EEE) feature select must be manually disabled. However, the driver does not disable EEE if the sw->features does not have the PTP_HW = BIT(31) flag.

EVB-KSZ9477/KSZ/linux-drivers/ksz9897/linux-5.10/drivers/net/ethernet/micrel/ksz_sw_9897.c

Lines 8855 to 8856 in 42b2453

	if (!(sw->features & PTP_HW))
	continue;

I don't have problems with link drops if I remove these lines.