ARM: shmobile: Remove legacy platform devices from EMEV2 SoC code

Now when KZM9D legacy C board support code is
gone then remove emev2_add_standard_devices()
and all the platform devices from setup-emev2.c.

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