staging: unisys: fix CamelCase locals in visorchipset_save_message

Rename CamelCased local variable names:

localSavedCrashMsgOffset => crash_msg_offset
localSavedCrashMsgCount => crash_msg_count

Update references to use the new names.

Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>