[PATCH] __page_symlink retry loop error code fix

If prepare_write or commit_write return AOP_TRUNCATED_PAGE we jump to
"retry" label and than if find_or_create_page() failed function return
incorrect error code.

Signed-off-by: Dmitriy Monakhov <dmonakhov@openvz.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>