Platform: Make UART1 non-secure by default

Make UART1 non-secure peripheral by default, which can
be switched to secure using a compile time switch for
demonstration purposes.

Change-Id: I834b7d9a2b42ce55e14ee9f06e244420c9e6ac5b
Signed-off-by: Miklos Balint <miklos.balint@arm.com>
9 files changed