mke2fs: don't let resize= turn on resize_inode when meta_bg is set

mke2fs: don't let resize= turn on resize_inode when meta_bg is set

Passing the "-E resize=NNN" option to mke2fs sets the resize_inode
feature.  However, resize_inode and meta_bg are mutually exclusive;
unfortunately, we check this constraint before we parse the extended
options.  Fix this by moving this check after the calls
parse_extended_opts().

Reported-by: "Darrick J. Wong" <darrick.wong@oracle.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>