ARM: dts: i.MX25: add AIPS control registers

The i.MX25 contains two AHB to IP bridges (AIPS), each of which has a set of
control registers. Add the memory regions for the control registers to
the Device Tree.

Signed-off-by: Martin Kaiser <martin@kaiser.cx>
Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>