ncpfs: fix a braino in OOM handling in ncp_fill_cache()

ncpfs: fix a braino in OOM handling in ncp_fill_cache()

Orabug: 23331002

[ Upstream commit 803c00123a8012b3a283c0530910653973ef6d8f ]

Failing to allocate an inode for child means that cache for *parent* is
incompletely populated.  So it's parent directory inode ('dir') that
needs NCPI_DIR_CACHE flag removed, *not* the child inode ('inode', which
is what we'd failed to allocate in the first place).

Fucked-up-in: commit 5e993e25 ("ncpfs: get rid of d_validate() nonsense")
Fucked-up-by: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org # v3.19
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
(cherry picked from commit 906e5a6e6e73316fa4741ca53be014c9477a100c)

Signed-off-by: Dan Duval <dan.duval@oracle.com>