fs/ubifs: remove unnecessary new_valid_dev check

As currently new_valid_dev always returns 1, so new_valid_dev check is not
needed, remove it.

CRs-Fixed: 975289
Change-Id: Ie8a5ad1fe326f35a9a25fcf4ff0000021c80fe5b
Signed-off-by: Yaowei Bai <bywxiaobai@163.com>
Reviewed-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Git-commit: 86ba9ed928f33cf6afbac433ff03dd8c6a0ceac4
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Nikhilesh Reddy <reddyn@codeaurora.org>