MIPS: Netlogic: remove unneeded semicolon in fmn_message_handler()

Fix the following coccicheck warning:

arch/mips/netlogic/xlr/fmn.c:106:2-3: Unneeded semicolon

Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Jason Yan <yanaijie@huawei.com>
Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>