net: phy: microchip_t1s: update LAN867x PHY supported revision number

As per AN1699, the initial configuration in the driver applies to LAN867x
Rev.B1 hardware revision. 0x0007C160 (Rev.A0) and 0x0007C161 (Rev.B0)
never released to production and hence they don't need to be supported.

Reviewed-by: Ramón Nordin Rodriguez <ramon.nordin.rodriguez@ferroamp.se>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Parthiban Veerasooran <Parthiban.Veerasooran@microchip.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>