staging: fbtft: Merged two identical conditionals into one.

Merged two if conditionals into a single one, since they had exactly
the same condition.

Signed-off-by: Narcisa Ana Maria Vasile <narcisaanamaria12@gmail.com>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>