net: macb: sync header definitions as taken from Linux

Few registers and bits were added by Cadence and
they were not updated in the headers.
Take the latest definitions as defined in Linux
header (5.1) that also includes some comments
about existing registers.

One register was improperly named (UR), fix that.
Signed-off-by: NRamon Fried <rfried.dev@gmail.com>
Reviewed-by: NAnup Patel <anup.patel@wdc.com>
Tested-by: NAnup Patel <anup.patel@wdc.com>
Acked-by: NJoe Hershberger <joe.hershberger@ni.com>

drivers/net/macb.c

@@ -774,14 +774,14 @@ static int _macb_init(struct macb_device *macb, const char *name)
 #ifdef CONFIG_DM_ETH
 		if ((macb->phy_interface == PHY_INTERFACE_MODE_RMII) ||
 		    (macb->phy_interface == PHY_INTERFACE_MODE_RGMII))
-			gem_writel(macb, UR, GEM_BIT(RGMII));
+			gem_writel(macb, USRIO, GEM_BIT(RGMII));
 		else
-			gem_writel(macb, UR, 0);
+			gem_writel(macb, USRIO, 0);
 #else
 #if defined(CONFIG_RGMII) || defined(CONFIG_RMII)
-		gem_writel(macb, UR, GEM_BIT(RGMII));
+		gem_writel(macb, USRIO, GEM_BIT(RGMII));
 #else
-		gem_writel(macb, UR, 0);
+		gem_writel(macb, USRIO, 0);
 #endif
 #endif
 	} else {