fix various issues

Signed-off-by: Jerry Yu <jerry.h.yu@arm.com>
diff --git a/library/ecdh_misc.h b/library/ecdh_misc.h
index c377e70..d1342f8 100644
--- a/library/ecdh_misc.h
+++ b/library/ecdh_misc.h
@@ -30,7 +30,7 @@
 #if defined(MBEDTLS_SSL_PROTO_TLS1_3_EXPERIMENTAL)
 
 /*
- * Setup context without everst
+ * Setup context without Everest
  */
 int mbedtls_ecdh_setup_no_everest( mbedtls_ecdh_context *ctx,
                                    mbedtls_ecp_group_id grp_id );