ext4: change s_mount_opt to be an unsigned int

We can only fit 32 options in s_mount_opt because an unsigned long is
32-bits on a x86 machine.  So use an unsigned int to save space on
64-bit platforms.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --cc fs/ext4/ext4.h
Simple merge

diff --cc fs/ext4/inode.c
Simple merge

diff --cc fs/ext4/super.c
Simple merge