b53: update header register difinitions

BCM531x5 has two pontential cpu ports, and header mode can be enabled
independently on both.

Signed-off-by: Jonas Gorski <jogo@openwrt.org>

SVN-Revision: 48302

target/linux/generic/files/drivers/net/phy/b53/b53_regs.h

@@ -181,7 +181,8 @@
 
 /* Broadcom Header control register (8 bit) */
 #define B53_BRCM_HDR			0x03
-#define   BRCM_HDR_EN			BIT(0) /* Enable tagging on IMP port */
+#define   BRCM_HDR_P8_EN		BIT(0) /* Enable tagging on port 8 */
+#define   BRCM_HDR_P5_EN		BIT(1) /* Enable tagging on port 5 */
 
 /* Device ID register (8 or 32 bit) */
 #define B53_DEVICE_ID			0x30