[RFC 1/6] thunder: select PTP driver if possible

[Arnd Bergmann]

The 'imply' selection means the driver can still be a loadable
module even if the main driver is built-in, leading to a link
error:

aarch64-linux-ld: drivers/net/ethernet/cavium/thunder/nicvf_main.o: in function `nicvf_remove':
nicvf_main.c:(.text+0x25c): undefined reference to `cavium_ptp_put'
aarch64-linux-ld: drivers/net/ethernet/cavium/thunder/nicvf_main.o: in function `nicvf_probe':
nicvf_main.c:(.text+0x3080): undefined reference to `cavium_ptp_get'

Use a 'select' statement instead.

Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
 drivers/net/ethernet/cavium/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/cavium/Kconfig b/drivers/net/ethernet/cavium/Kconfig
index 6a700d34019e..52806ef20d2d 100644
--- a/drivers/net/ethernet/cavium/Kconfig
+++ b/drivers/net/ethernet/cavium/Kconfig
@@ -27,7 +27,7 @@ config THUNDER_NIC_PF
 
 config THUNDER_NIC_VF
 	tristate "Thunder Virtual function driver"
-	imply CAVIUM_PTP
+	select CAVIUM_PTP if POSIX_TIMERS
 	depends on 64BIT && PCI
 	---help---
 	  This driver supports Thunder's NIC virtual function
-- 
2.26.0