ubifs: journal: Fix error return code in ubifs_jnl_write_inode()

ubifs: journal: Fix error return code in ubifs_jnl_write_inode()

BugLink: https://bugs.launchpad.net/bugs/1939738
[ Upstream commit a2c2a622d41168f9fea2aa3f76b9fbaa88531aac ]

Fix to return a negative error code from the error handling case instead
of 0, as done elsewhere in this function.

Fixes: 9ca2d7326444 ("ubifs: Limit number of xattrs per inode")
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zhen Lei <thunder.leizhen@huawei.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>