greybus: operation: replace pr_err with dev_err

Use dev_err whenever we have a connection for more informative error
messages.

Signed-off-by: Johan Hovold <johan@hovoldconsulting.com>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <greg@kroah.com>
1 file changed
tree: 199bfd31d2a5a5b24e5c9bbcf658759346ad4190
  1. drivers/