pps, ptp: Remove dependencies on EXPERIMENTAL

These are now established subsystems, and we want drivers to be able
to select PPS and PTP_1588_CLOCK without depending on EXPERIMENTAL.
Further, the use of EXPERIMENTAL is now deprecated in general.
Signed-off-by: NBen Hutchings <bhutchings@solarflare.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/intel/Kconfig

@@ -123,7 +123,7 @@ config IGB_DCA
 config IGB_PTP
 	bool "PTP Hardware Clock (PHC)"
 	default n
-	depends on IGB && EXPERIMENTAL
+	depends on IGB
 	select PPS
 	select PTP_1588_CLOCK
 	---help---
@@ -225,7 +225,7 @@ config IXGBE_DCB
 config IXGBE_PTP
 	bool "PTP Clock Support"
 	default n
-	depends on IXGBE && EXPERIMENTAL
+	depends on IXGBE
 	select PPS
 	select PTP_1588_CLOCK
 	---help---

drivers/net/ethernet/oki-semi/pch_gbe/Kconfig

@@ -26,7 +26,6 @@ if PCH_GBE
 config PCH_PTP
 	bool "PCH PTP clock support"
 	default n
-	depends on EXPERIMENTAL
 	select PPS
 	select PTP_1588_CLOCK
 	select PTP_1588_CLOCK_PCH

drivers/pps/Kconfig

@@ -6,7 +6,6 @@ menu "PPS support"
 
 config PPS
 	tristate "PPS support"
-	depends on EXPERIMENTAL
 	---help---
 	  PPS (Pulse Per Second) is a special pulse provided by some GPS
 	  antennae. Userland can use it to get a high-precision time

drivers/ptp/Kconfig

@@ -9,7 +9,6 @@ comment "Enable Device Drivers -> PPS to see the PTP clock options."
 
 config PTP_1588_CLOCK
 	tristate "PTP clock support"
-	depends on EXPERIMENTAL
 	depends on PPS
 	help
 	  The IEEE 1588 standard defines a method to precisely