Platform: Refactor the linker files

Remove the limitation between level 1 and other levels.
For TFM_LVL == 1, it moves the data of partition to its
own section. This does not affect other isolation levels.

Change-Id: Ie7e5dbf1b26255acb71de76574f1e201530423dc
Signed-off-by: Summer Qin <summer.qin@arm.com>
16 files changed