Staging: rts5208: remove unnecessary parantheses

This patch removes unnecessary parantheses around rtsx->pci->dev.

Signed-off-by: Haneen Mohammed <hamohammed.sa@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>