Add FVP build config for Corstone1000

Corstone1000 has two variants -- one for FVP and one for FPGA.
It is controlled by config PLATFORM_IS_FVP.
Update CI build commands to better support Corstone1000.

Signed-off-by: Xinyu Zhang <xinyu.zhang@arm.com>
Change-Id: I9fa690d1179fbc20155fbe7cb8a2fadb86f29580
diff --git a/tfm_ci_pylib/tfm_build_manager.py b/tfm_ci_pylib/tfm_build_manager.py
index 673771c..8a45305 100644
--- a/tfm_ci_pylib/tfm_build_manager.py
+++ b/tfm_ci_pylib/tfm_build_manager.py
@@ -75,7 +75,9 @@
                   "FPSOFT":        "-DCONFIG_TFM_FP=soft ",
                   "FPHARD":        "-DCONFIG_TFM_FP=hard ",
                   "FPHARD_LOFF":   ("-DCONFIG_TFM_FP=hard "
-                                    "-DCONFIG_TFM_LAZY_STACKING=OFF ")
+                                    "-DCONFIG_TFM_LAZY_STACKING=OFF "),
+                  "FVP":           "-DPLATFORM_IS_FVP=True",
+                  "FPGA":          "-DPLATFORM_IS_FVP=False"
                   }
 
 class TFM_Build_Manager(structuredTask):