ext4: use seq_putc() in two functions

Single characters (line breaks) should be put into a sequence.
Thus use the corresponding function “seq_putc”.

This issue was transformed by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Link: https://patch.msgid.link/076974ab-4da3-4176-89dc-0514e020c276@web.de


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