ARM: dts: vfxxx: add missing reg properties

Add missing reg properties to AIPS bus and Cortex-A5's PMU unit.
This change avoids the following warnings:
 Warning (unit_address_vs_reg): Node /soc/aips-bus@40000000 has a unit
 name, but no reg property
 Warning (unit_address_vs_reg): Node /soc/aips-bus@40080000 has a unit
 name, but no reg property
 Warning (unit_address_vs_reg): Node /soc/aips-bus@40080000/pmu@40089000
 has a unit name, but no reg property

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>