Use new psci::smccc error handling rather than smccc library.

Test: Built pvmfw and rialto
Change-Id: I79eb0ca966a6e970dde1c1d73a55db38c549df5c
diff --git a/libs/hyp/src/lib.rs b/libs/hyp/src/lib.rs
index 66c78f4..6db6ba8 100644
--- a/libs/hyp/src/lib.rs
+++ b/libs/hyp/src/lib.rs
@@ -21,4 +21,4 @@
 mod util;
 
 pub use error::{Error, Result};
-pub use hypervisor::{get_hypervisor, Hypervisor};
+pub use hypervisor::{get_hypervisor, Hypervisor, KvmError};