morello: Reintroduce tf-l3 and scp boot tests

Commit 973e6636b893ebb14c9ef9323fe45e942ec09796 disabled
Platform CI tests for Morello because of a major change
in the boot flow.

Update Morello run/build/model scripts to adhere to the
newly introduced TBBR based boot flow, and re-enable the
boot tests.

Signed-off-by: Anurag Koul <anurag.koul@arm.com>
Change-Id: Ib4646e48395e2a6293e4f8bbcf4b85c1b85e7000
diff --git a/scp_config/fvp-morello b/scp_config/fvp-morello
index 678a3db..6431503 100644
--- a/scp_config/fvp-morello
+++ b/scp_config/fvp-morello
@@ -2,4 +2,4 @@
 EXTRA_CONFIG_ARGS+=-DCMAKE_ASM_COMPILER=/arm/pdsw/downloads/scp-models/tools/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-gcc
 EXTRA_CONFIG_ARGS+=-DCMAKE_C_COMPILER=/arm/pdsw/downloads/scp-models/tools/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-gcc
 EXTRA_CONFIG_ARGS+=-DCMAKE_CXX_COMPILER=/arm/pdsw/downloads/scp-models/tools/gcc-arm-none-eabi-9-2020-q2-update/bin/arm-none-eabi-g++
-EXTRA_CONFIG_ARGS+=-DSCP_LOG_LEVEL=INFO
\ No newline at end of file
+EXTRA_CONFIG_ARGS+=-DSCP_LOG_LEVEL=INFO