firewire: Use ktime_get_ts()

do_posix_clock_monotonic_gettime() is a leftover from the initial
posix timer implementation which maps to ktime_get_ts()

Signed-off-by: Thomas Gleixner <[e-mail]>
Cc: John Stultz <[e-mail]>
Cc: Peter Zijlstra <[e-mail]>
Acked-by: Stefan Richter <[e-mail]>
Link: http://lkml.kernel.org/r/[e-mail]
Signed-off-by: Thomas Gleixner <[e-mail]>

drivers/firewire/core-cdev.c

···
 	cycle_time = card->driver->read_csr(card, CSR_CYCLE_TIME);
 
 	switch (a->clk_id) {
-	case CLOCK_REALTIME:      getnstimeofday(&ts);                   break;
-	case CLOCK_MONOTONIC:     do_posix_clock_monotonic_gettime(&ts); break;
-	case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts);                  break;
+	case CLOCK_REALTIME:      getnstimeofday(&ts);	break;
+	case CLOCK_MONOTONIC:     ktime_get_ts(&ts);	break;
+	case CLOCK_MONOTONIC_RAW: getrawmonotonic(&ts);	break;
 	default:
 		ret = -EINVAL;
 	}