net: pktgen: fix code style (WARNING: please, no space before tabs)

Fix checkpatch code style warnings:

  WARNING: please, no space before tabs
  kernel-patches#230: FILE: net/core/pktgen.c:230:
  +#define M_NETIF_RECEIVE ^I1^I/* Inject packets into stack */$

Signed-off-by: Peter Seiderer <ps.report@gmx.net>
Reviewed-by: Simon Horman <horms@kernel.org>
Signed-off-by: NipaLocal <nipa@local>

Author: pseiderer

net/core/pktgen.c

@@ -227,7 +227,7 @@ static char *pkt_flag_names[] = {
 
 /* Xmit modes */
 #define M_START_XMIT		0	/* Default normal TX */
-#define M_NETIF_RECEIVE 	1	/* Inject packets into stack */
+#define M_NETIF_RECEIVE		1	/* Inject packets into stack */
 #define M_QUEUE_XMIT		2	/* Inject packet into qdisc */
 
 /* If lock -- protects updating of if_list */