net: fec: default select FEC_PTP at mx6 platform

Remove PPS.
Limit FEC_PTP option for i.MX chip only.
FEC_PTP default is on at mx6 platform.
Signed-off-by: Frank Li <Frank.Li@freescale.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/Kconfig

@@ -94,9 +94,9 @@ config GIANFAR
 
 config FEC_PTP
 	bool "PTP Hardware Clock (PHC)"
-	depends on FEC
-	select PPS
+	depends on FEC && ARCH_MXC
 	select PTP_1588_CLOCK
+	default y if SOC_IMX6Q
 	--help---
 	  Say Y here if you want to use PTP Hardware Clock (PHC) in the
 	  driver.  Only the basic clock operations have been implemented.