mtd: nand: pxa3xx_nand: Update Kconfig information

More and more SoCs use the pxa3xx_nand driver for their controller but
the list of them was not updated. This patch add the last SoCs using the
driver.

Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>