net: Fix typo in comment about ancillary data

Ingo sent typo fixes for tools/ and this resulted in a warning when
building the perf/core branch that will be sent upstream in the next
merge window:

  Warning: Kernel ABI header at 'tools/perf/trace/beauty/include/linux/socket.h' differs from latest version at 'include/linux/socket.h'
  diff -u tools/perf/trace/beauty/include/linux/socket.h include/linux/socket.h

Fix the typo on the kernel file to address this.
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

include/linux/socket.h

@@ -85,7 +85,7 @@ struct mmsghdr {
 
 /*
  *	POSIX 1003.1g - ancillary data object information
- *	Ancillary data consits of a sequence of pairs of
+ *	Ancillary data consists of a sequence of pairs of
  *	(cmsghdr, cmsg_data[])
  */