net: phy: export genphy_c45_baset1_read_status()

commit 462950d1514ccda705e23b9961dc8a434c80d68d from
https://github.com/nxp-auto-linux/linux

Export genphy_c45_baset1_read_status() to make it reusable by PHY drivers.

Issue: ALB-10440

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
(cherry picked from commit 2013ad88

)
Signed-off-by: Zhantao Tang <zhantao.tang@windriver.com>