Seperate declarations from function body

Signed-off-by: Agathiyan Bragadeesh <agathiyan.bragadeesh2@arm.com>
diff --git a/library/psa_crypto.c b/library/psa_crypto.c
index d1e6b5c..fade286 100644
--- a/library/psa_crypto.c
+++ b/library/psa_crypto.c
@@ -4901,6 +4901,7 @@
 {
     mbedtls_ecp_keypair *ecp = NULL;
     psa_status_t status;
+
     switch (alg) {
 #if defined(MBEDTLS_PSA_BUILTIN_ALG_ECDH)
         case PSA_ALG_ECDH: