enic: fix boolreturn.cocci warnings

drivers/net/ethernet/cisco/enic/vnic_dev.c:1294:9-10: WARNING: return of 0/1 in function 'vnic_dev_capable_udp_rss' with return type bool

 Return statements in functions returning bool should use
 true/false instead of 1/0.
Generated by: scripts/coccinelle/misc/boolreturn.cocci

Fixes: 48398b6e ("enic: set UDP rss flag")
CC: Govindarajulu Varadarajan <gvaradar@cisco.com>
Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>