NET: FEC: dynamtic check DMA desc buff type

MX6 and mx28 support enhanced DMA descriptor buff to support 1588
ptp. But MX25, MX3x, MX5x can't support enhanced DMA descriptor buff.
Check fec type and choose correct DMA descriptor buff type.

Remove static config CONFIG_FEC_PTP.
ptp function will be auto detected.

Signed-off-by: Frank Li <Frank.Li@freescale.com>
Acked-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/Kconfig

@@ -26,6 +26,7 @@ config FEC
 		   ARCH_MXC || SOC_IMX28)
 	default ARCH_MXC || SOC_IMX28 if ARM
 	select PHYLIB
+	select PTP_1588_CLOCK
 	---help---
 	  Say Y here if you want to use the built-in 10/100 Fast ethernet
 	  controller on some Motorola ColdFire and Freescale i.MX processors.
@@ -92,12 +93,4 @@ config GIANFAR
 	  This driver supports the Gigabit TSEC on the MPC83xx, MPC85xx,
 	  and MPC86xx family of chips, and the FEC on the 8540.
 
-config FEC_PTP
-	bool "PTP Hardware Clock (PHC)"
-	depends on FEC && ARCH_MXC && !SOC_IMX25 && !SOC_IMX27 && !SOC_IMX35 && !SOC_IMX5
-	select PTP_1588_CLOCK
-	--help---
-	  Say Y here if you want to use PTP Hardware Clock (PHC) in the
-	  driver.  Only the basic clock operations have been implemented.
-
 endif # NET_VENDOR_FREESCALE

drivers/net/ethernet/freescale/Makefile

@@ -2,8 +2,7 @@
 # Makefile for the Freescale network device drivers.
 #
 
-obj-$(CONFIG_FEC) += fec.o
-obj-$(CONFIG_FEC_PTP) += fec_ptp.o
+obj-$(CONFIG_FEC) += fec.o fec_ptp.o
 obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx.o
 ifeq ($(CONFIG_FEC_MPC52xx_MDIO),y)
 	obj-$(CONFIG_FEC_MPC52xx) += fec_mpc52xx_phy.o