driver: net: fm: add DM ETH support

Probe the FMan MACs based on the device tree while
retaining the legacy code/functionality.
One notable change introduced here is that, for DM_ETH,
the name of the interfaces is corrected to the fmX-macY
format, that avoids the referral to the MAC block names
which were incorrect for FMan v3 devices (i.e. DTSEC,
TGEC) and had weird formatting (i.e. FM1@DTSEC6, FM1@TGEC1).
The legacy code is left unchanged in this respect.

Signed-off-by: Madalin Bucur <madalin.bucur@oss.nxp.com>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/drivers/net/fm/fm.h b/drivers/net/fm/fm.h
index e5deaf5..2379b3a 100644
--- a/drivers/net/fm/fm.h
+++ b/drivers/net/fm/fm.h
@@ -57,6 +57,18 @@
 #define TxBD_READY		0x8000
 #define TxBD_LAST		BD_LAST
 
+#ifdef CONFIG_DM_ETH
+enum fm_mac_type {
+#ifdef CONFIG_SYS_FMAN_V3
+	FM_MEMAC,
+#else
+	FM_DTSEC,
+	FM_TGEC,
+#endif
+};
+#endif
+
+/* Fman ethernet private struct */
 /* Rx/Tx queue descriptor */
 struct fm_port_qd {
 	u16 gen;
@@ -101,6 +113,11 @@
 phy_interface_t fman_port_enet_if(enum fm_port port);
 void fman_disable_port(enum fm_port port);
 void fman_enable_port(enum fm_port port);
+int fman_id(struct udevice *dev);
+void *fman_port(struct udevice *dev, int num);
+#ifdef CONFIG_DM_ETH
+void *fman_mdio(struct udevice *dev, enum fm_mac_type type, int num);
+#endif
 
 struct fsl_enet_mac {
 	void *base; /* MAC controller registers base address */
@@ -126,7 +143,13 @@
 	struct mii_dev *bus;
 	struct phy_device *phydev;
 	int phyaddr;
+#ifndef CONFIG_DM_ETH
 	struct eth_device *dev;
+#else
+	enum fm_mac_type mac_type;
+	struct udevice *dev;
+	struct udevice *pcs_mdio;
+#endif
 	int max_rx_len;
 	struct fm_port_global_pram *rx_pram; /* Rx parameter table */
 	struct fm_port_global_pram *tx_pram; /* Tx parameter table */