net/macb: convert to kernel doc

This patch coverts struct description to the kernel doc format. There is no
functional change.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/platform_data/macb.h

@@ -8,11 +8,19 @@
 #ifndef __MACB_PDATA_H__
 #define __MACB_PDATA_H__
 
+/**
+ * struct macb_platform_data - platform data for MACB Ethernet
+ * @phy_mask:		phy mask passed when register the MDIO bus
+ *			within the driver
+ * @phy_irq_pin:	PHY IRQ
+ * @is_rmii:		using RMII interface?
+ * @rev_eth_addr:	reverse Ethernet address byte order
+ */
 struct macb_platform_data {
 	u32		phy_mask;
-	int		phy_irq_pin;	/* PHY IRQ */
-	u8		is_rmii;	/* using RMII interface? */
-	u8		rev_eth_addr;	/* reverse Ethernet address byte order */
+	int		phy_irq_pin;
+	u8		is_rmii;
+	u8		rev_eth_addr;
 };
 
 #endif /* __MACB_PDATA_H__ */