Drop few redundant device_is_ready for functions that are only used as
argument to shell_device_filter, as shell_device_filter checks for that
alrady.
Suggested-by: Yishai Jaffe <yishai1999@gmail.com>
Signed-off-by: Fabio Baltieri <fabiobaltieri@google.com>
Use shell_device_get_binding() instead of device_get_binding() so that
we get the device based on its name and in addition by its label.
Signed-off-by: Yishai Jaffe <yishai1999@gmail.com>
