staging: rts5208/ms.c: change the label name to respect the coding style

This patch changes label names using camel case to snake case as well as giving
a new name representing what will be done after the label.

Signed-off-by: Quentin Lambert <lambert.quentin@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>