MLK-16753-9 imx: mx7: add optee support

MLK-16753-9 imx: mx7: add optee support

Add different defconfigs.
Enable Trustzone.
Update env to runtime boot OP-TEE.
mx7d arm2 board not supported now.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
(cherry picked from commit 435807b41ae99bb9f4e0b2c7b9e5287c2bd520c0)
(cherry picked from commit b78124c2f68b9aa4ec2f160d99364bfab72ab5e3)
(cherry picked from commit 641b195a5633cfc3960a42bbb332dd8fead9f939)
(cherry picked from commit 4ca1af73ade293f135ccf44686f87e39b1f494ec)
(cherry picked from commit eaff76c0f64ca756952c91a923a7bbeeffa36107)
(cherry picked from commit 44b2dafa6b97cc6b4ac0fe6a16010212f6dc9a81)