net: ipv4: Fix truncated timestamp returned by inet_current_timestamp()

net: ipv4: Fix truncated timestamp returned by inet_current_timestamp()

The millisecond timestamps returned by the function is
converted to network byte order by making a call to htons().
htons() only returns __be16 while __be32 is required here.

This was identified by the sparse warning from the buildbot:
net/ipv4/af_inet.c:1405:16: sparse: incorrect type in return
			    expression (different base types)
net/ipv4/af_inet.c:1405:16: expected restricted __be32
net/ipv4/af_inet.c:1405:16: got restricted __be16 [usertype] <noident>

Change the function to use htonl() to return the correct __be32 type
instead so that the millisecond value doesn't get truncated.

Signed-off-by: Deepa Dinamani <[email protected]>
Cc: "David S. Miller" <[email protected]>
Cc: Alexey Kuznetsov <[email protected]>
Cc: Hideaki YOSHIFUJI <[email protected]>
Cc: James Morris <[email protected]>
Cc: Patrick McHardy <[email protected]>
Cc: Arnd Bergmann <[email protected]>
Fixes: 822c868532ca ("net: ipv4: Convert IP network timestamps to be y2038 safe")
Reported-by: Fengguang Wu <[email protected]> [0-day test robot]
Signed-off-by: David S. Miller <[email protected]>