staging: rts5208: Correct line ending with '('

Adhere to Linux kernel coding style.

Reported by checkpatch:

CHECK: Lines should not end with a '('

Signed-off-by: Cyrus Ramavarapu <cyrus.ramavarapu@gmail.com>
Link: https://lore.kernel.org/r/20230716223905.2187-1-cyrus.ramavarapu@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>