linux-imx

Doc: ja_JP: Fix a typo in HOWTO

This patch fix a typo witin HOWTO, which was translated in Japanese.
Replace a word "kernlehacker" with "kernelhacker".

Signed-off-by: Masanari Iida <standby24x7@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>