liquidio: fix timespec64_to_ns typo

While experimenting with changes to the timekeeping code, I
ran into a build error in the liquidio driver:

drivers/net/ethernet/cavium/liquidio/lio_main.c: In function 'liquidio_ptp_settime':
drivers/net/ethernet/cavium/liquidio/lio_main.c:1850:22: error: passing argument 1 of 'timespec_to_ns' from incompatible pointer type [-Werror=incompatible-pointer-types]

The driver had a type mismatch since it was first merged, but
this never caused problems because it is only built on 64-bit
architectures that define timespec and timespec64 to the same
type.

If we ever want to compile-test the driver on 32-bit or change
the way that 64-bit timespec64 is defined, we need to fix it,
so let's just do it now.

Fixes: f21fb3ed ("Add support of Cavium Liquidio ethernet adapters")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Felix Manlunas <felix.manlunas@cavium.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/cavium/liquidio/lio_main.c

@@ -1847,7 +1847,7 @@ static int liquidio_ptp_settime(struct ptp_clock_info *ptp,
 	struct lio *lio = container_of(ptp, struct lio, ptp_info);
 	struct octeon_device *oct = (struct octeon_device *)lio->oct_dev;
 
-	ns = timespec_to_ns(ts);
+	ns = timespec64_to_ns(ts);
 
 	spin_lock_irqsave(&lio->ptp_lock, flags);
 	lio_pci_writeq(oct, ns, CN6XXX_MIO_PTP_CLOCK_HI);