erofs-utils: avoid the potentially wrong m_plen for big pcluster

Keep in sync with the kernel commit 0d53d2e882f9 ("erofs: avoid the
potentially wrong m_plen for big pcluster").

Signed-off-by: Yue Hu <huyue2@coolpad.com>
Reviewed-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20221031022653.14981-1-zbestahu@gmail.com
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
1 file changed