ARM: at91/at91sam9x5: overall definition

Add the definitions of peripheral and system registers for sam9x5 chips family.

Signed-off-by: Dan Liang <dan.liang@atmel.com>
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Acked-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>