net: macb: convert to phylink

This patch converts the MACB Ethernet driver to the Phylink framework.
The MAC configuration is moved to the Phylink ops and Phylink helpers
are now used in the ethtools functions. This helps to access the flow
control and pauseparam logic and this will be helpful in the future for
boards using this controller with SFP cages.
Tested-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cadence/Kconfig

@@ -22,7 +22,7 @@ if NET_VENDOR_CADENCE
 config MACB
 	tristate "Cadence MACB/GEM support"
 	depends on HAS_DMA && COMMON_CLK
-	select PHYLIB
+	select PHYLINK
 	---help---
 	  The Cadence MACB ethernet interface is found on many Atmel AT32 and
 	  AT91 parts.  This driver also supports the Cadence GEM (Gigabit

drivers/net/ethernet/cadence/macb.h

@@ -7,7 +7,7 @@
 #ifndef _MACB_H
 #define _MACB_H
 
-#include <linux/phy.h>
+#include <linux/phylink.h>
 #include <linux/ptp_clock_kernel.h>
 #include <linux/net_tstamp.h>
 #include <linux/interrupt.h>
@@ -1185,15 +1185,14 @@ struct macb {
 	struct macb_or_gem_ops	macbgem_ops;
 
 	struct mii_bus		*mii_bus;
-	struct device_node	*phy_node;
-	int 			link;
-	int 			speed;
-	int 			duplex;
+	struct phylink		*phylink;
+	struct phylink_config	phylink_config;
 
 	u32			caps;
 	unsigned int		dma_burst_length;
 
 	phy_interface_t		phy_interface;
+	int			speed;
 
 	/* AT91RM9200 transmit */
 	struct sk_buff *skb;			/* holds skb until xmit interrupt completes */