coverity: fix MISRA violations

Fixes for the following MISRA violations:
- Missing explicit parentheses on sub-expression
- An identifier or macro name beginning with an
  underscore, shall not be declared
- Type mismatch in BL1 SMC handlers and tspd_main.c

Change-Id: I7a92abf260da95acb0846b27c2997b59b059efc4
Signed-off-by: Zelalem <zelalem.aweke@arm.com>
diff --git a/services/spd/tspd/tspd_main.c b/services/spd/tspd/tspd_main.c
index f206724..b0cbf62 100644
--- a/services/spd/tspd/tspd_main.c
+++ b/services/spd/tspd/tspd_main.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2013-2019, ARM Limited and Contributors. All rights reserved.
+ * Copyright (c) 2013-2020, ARM Limited and Contributors. All rights reserved.
  *
  * SPDX-License-Identifier: BSD-3-Clause
  */
@@ -126,7 +126,7 @@
 	 * interrupt handling.
 	 */
 	if (get_yield_smc_active_flag(tsp_ctx->state)) {
-		tsp_ctx->saved_spsr_el3 = SMC_GET_EL3(&tsp_ctx->cpu_ctx,
+		tsp_ctx->saved_spsr_el3 = (uint32_t)SMC_GET_EL3(&tsp_ctx->cpu_ctx,
 						      CTX_SPSR_EL3);
 		tsp_ctx->saved_elr_el3 = SMC_GET_EL3(&tsp_ctx->cpu_ctx,
 						     CTX_ELR_EL3);