metag: rename llseek syscall to _llseek

The raw llseek syscall is called _llseek from userland, so fix the
naming of it for metag to allow the stat test to pass.

* linux/metag/syscallent.h: Rename llseek syscall to _llseek.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
1 file changed