Interface: Improvements on framework_feature

- Restrict variable replacement on "@VAR@" only
- Set PSA_FRAMEWORK_ISOLATION_LEVEL before configure_file
- Add invalid config check on:
    TFM_LIB_MODEL AND PSA_FRAMEWORK_ISOLATION_LEVEL

Change-Id: Ib3a681716dfb148f62ca4ea0c03b2de9a65b7ca5
Signed-off-by: Kevin Peng <kevin.peng@arm.com>
4 files changed