ARM: shmobile: APE6EVM base support

V3 of APE6EVM base board support making use of
1 GiB of memory, the SCIFA0 serial port and
ARM architected timer.

Signed-off-by: Magnus Damm <damm@opensource.se>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>