usbnet: smsc95xx: Don't reset PHY behind PHY driver's back

smsc95xx_reset() resets the PHY behind the PHY driver's back, which
seems like a bad idea generally.  Remove that portion of the function.

We're about to use PHY interrupts instead of polling to detect link
changes on SMSC LAN95xx chips.  Because smsc95xx_reset() is called from
usbnet_open(), PHY interrupt settings are lost whenever the net_device
is brought up.

There are two other callers of smsc95xx_reset(), namely smsc95xx_bind()
and smsc95xx_reset_resume(), and both may indeed benefit from a PHY
reset.  However they already perform one through their calls to
phy_connect_direct() and phy_init_hw().

Tested-by: Oleksij Rempel <[email protected]> # LAN9514/9512/9500
Tested-by: Ferry Toth <[email protected]> # LAN9514
Signed-off-by: Lukas Wunner <[email protected]>
Cc: Martyn Welch <[email protected]>
Cc: Gabriel Hojda <[email protected]>
Reviewed-by: Andrew Lunn <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

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