ifb: remove leading spaces before tabs

There are a few leading spaces before tabs and remove it by running
the following commard:

    $ find . -name '*.[ch]' | xargs sed -r -i 's/^[ ]+\t/\t/'
Signed-off-by: Hui Tang <tanghui20@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ifb.c

@@ -16,10 +16,10 @@
 	by Patrick McHardy and then maintained by Andre Correa.
 
 	You need the tc action  mirror or redirect to feed this device
-       	packets.
+	packets.
 
 
-  	Authors:	Jamal Hadi Salim (2005)
+	Authors:	Jamal Hadi Salim (2005)
 
 */