sw64: fix sendfile system call

Sunway inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I56XYC

--------------------------------

Using sys_sendfile will cause failure in sending large file(>=2GB).
This patch fixes the problem.
Signed-off-by: NHe Sheng <hesheng@wxiat.com>
Signed-off-by: NGu Zitao <guzitao@wxiat.com>
Acked-by: NXie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>

arch/sw_64/kernel/syscalls/syscall.tbl

@@ -377,7 +377,7 @@
 367	common	getcwd				sys_getcwd
 368	common	capget				sys_capget
 369	common	capset				sys_capset
-370	common	sendfile			sys_sendfile
+370	common	sendfile			sys_sendfile64
 371	common	setresgid			sys_setresgid
 372	common	getresgid			sys_getresgid
 373	common	dipc				sys_ni_syscall