remoteproc/omap: fix dev_err typo

commit 6b03976288538a94e072bbfcd12d69a20daea8aa upstream.

For some reason one of the dev_err invocations is using a wrong
device so fix that.

Signed-off-by: Ohad Ben-Cohen <ohad@wizery.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>