staging:rtl8192u: Rename BaTimeoutValue - Style

Rename BaTimeoutValue to timeout_value. This clears checkpatch issue
with CamelCase naming.

This is a coding style change which should have no impact on runtime
code execution.

Signed-off-by: John Whitmore <johnfwhitmore@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>