erofs-utils: make some functions static in inode.c

They are only used in inode.c, no need to be in global scope.

Link: https://lore.kernel.org/r/20210616065941.881-1-zbestahu@gmail.com
Reviewed-by: Gao Xiang <xiang@kernel.org>
Signed-off-by: Yue Hu <huyue2@yulong.com>
Signed-off-by: Gao Xiang <xiang@kernel.org>
1 file changed