net: fec: remove redundant variable 'inc'

Variable 'inc' is being assigned but is never used hence it is
redundant and can be removed.

Cleans up clang warning:
warning: variable 'inc' set but not used [-Wunused-but-set-variable]
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/freescale/fec_ptp.c

@@ -99,7 +99,6 @@ static int fec_ptp_enable_pps(struct fec_enet_private *fep, uint enable)
 {
 	unsigned long flags;
 	u32 val, tempval;
-	int inc;
 	struct timespec64 ts;
 	u64 ns;
 	val = 0;
@@ -114,7 +113,6 @@ static int fec_ptp_enable_pps(struct fec_enet_private *fep, uint enable)
 
 	fep->pps_channel = DEFAULT_PPS_CHANNEL;
 	fep->reload_period = PPS_OUPUT_RELOAD_PERIOD;
-	inc = fep->ptp_inc;
 
 	spin_lock_irqsave(&fep->tmreg_lock, flags);