[PATCH -next] sfc: siena: Fix Kconfig dependencies

[Ren Zhijie]

If CONFIG_PTP_1588_CLOCK=m and CONFIG_SFC_SIENA=y, the siena driver will fail to link:

drivers/net/ethernet/sfc/siena/ptp.o: In function `efx_ptp_remove_channel':
ptp.c:(.text+0xa28): undefined reference to `ptp_clock_unregister'
drivers/net/ethernet/sfc/siena/ptp.o: In function `efx_ptp_probe_channel':
ptp.c:(.text+0x13a0): undefined reference to `ptp_clock_register'
ptp.c:(.text+0x1470): undefined reference to `ptp_clock_unregister'
drivers/net/ethernet/sfc/siena/ptp.o: In function `efx_ptp_pps_worker':
ptp.c:(.text+0x1d29): undefined reference to `ptp_clock_event'
drivers/net/ethernet/sfc/siena/ptp.o: In function `efx_siena_ptp_get_ts_info':
ptp.c:(.text+0x301b): undefined reference to `ptp_clock_index'

To fix this build error, make SFC_SIENA depends on PTP_1588_CLOCK.

Reported-by: Hulk Robot <hulkci@xxxxxxxxxx>
Fixes: d48523cb88e0("sfc: Copy shared files needed for Siena (part 2)")
Signed-off-by: Ren Zhijie <renzhijie2@xxxxxxxxxx>
---
 drivers/net/ethernet/sfc/siena/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/net/ethernet/sfc/siena/Kconfig b/drivers/net/ethernet/sfc/siena/Kconfig
index 3d52aee50d5a..3675233e963a 100644
--- a/drivers/net/ethernet/sfc/siena/Kconfig
+++ b/drivers/net/ethernet/sfc/siena/Kconfig
@@ -2,6 +2,7 @@
 config SFC_SIENA
 	tristate "Solarflare SFC9000 support"
 	depends on PCI
+	depends on PTP_1588_CLOCK
 	select MDIO
 	select CRC32
 	help
-- 
2.17.1