ARM: 7695/1: mvebu: Enable pj4b on LPAE compilations

pj4b cpus are LPAE capable so enable them on LPAE compilations

Signed-off-by: Lior Amsalem <alior@marvell.com>
Tested-by: Franklin <flin@marvell.com>
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>