sim: PSA Crypto ECDSA enablement

This commit enables ECDSA signature verification using
PSA Crypto API.

Signed-off-by: Roland Mikhel <roland.mikhel@arm.com>
Change-Id: I33f559ecdd59b1ce41c6a2d5f315212300d585e3
diff --git a/sim/src/caps.rs b/sim/src/caps.rs
index 5463173..d8dd068 100644
--- a/sim/src/caps.rs
+++ b/sim/src/caps.rs
@@ -29,6 +29,7 @@
     RamLoad              = (1 << 16),
     DirectXip            = (1 << 17),
     HwRollbackProtection = (1 << 18),
+    EcdsaP384            = (1 << 19),
 }
 
 impl Caps {
@@ -39,7 +40,7 @@
 
     /// Does this build have ECDSA of some type enabled for signatures.
     pub fn has_ecdsa() -> bool {
-        Caps::EcdsaP256.present()
+        Caps::EcdsaP256.present() || Caps::EcdsaP384.present()
     }
 
     /// Query for the number of images that have been configured into this