staging:rtl8192u: Rename enum constants - Style

Rename the two constants defined in the enumerated type enum
cck_rx_path_method so that they are both uppercase, as suggested by
the coding style.

This is purely a coding style change and 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>