Fix SEI CERT coding standard warnings

Change-Id: I47fdf29a50440c82fd9ccf111a846bf87e8a9e29
diff --git a/drivers/mhu_v2/src/mhu_v2.cpp b/drivers/mhu_v2/src/mhu_v2.cpp
index cdeb90b..1c2e2f6 100644
--- a/drivers/mhu_v2/src/mhu_v2.cpp
+++ b/drivers/mhu_v2/src/mhu_v2.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020-2021 Arm Limited. All rights reserved.
+ * SPDX-FileCopyrightText: Copyright 2020-2021, 2023 Arm Limited and/or its affiliates <open-source-office@arm.com>
  *
  * SPDX-License-Identifier: Apache-2.0
  *
@@ -112,9 +112,9 @@
 void MHUv2::setCombinedClearInterrupt(bool enable) {
     uint32_t val = txRead(MHUv2_SND_INT_EN_OFFS);
     if (enable) {
-        val |= (1 << 2);
+        val |= (1u << 2);
     } else {
-        val &= ~(1 << 2);
+        val &= ~(1u << 2);
     }
     txWrite(MHUv2_SND_INT_EN_OFFS, val);
 }
@@ -126,9 +126,9 @@
 void MHUv2::setCombinedRecvInterrupt(bool enable) {
     uint32_t val = rxRead(MHUv2_RCV_INT_EN_OFFS);
     if (enable) {
-        val |= (1 << 2);
+        val |= (1u << 2);
     } else {
-        val &= ~(1 << 2);
+        val &= ~(1u << 2);
     }
     rxWrite(MHUv2_SND_INT_EN_OFFS, val);
 }
@@ -137,9 +137,9 @@
 void MHUv2::setReadyNotReadyInterrupts(bool enable) {
     uint32_t val = txRead(MHUv2_SND_INT_EN_OFFS);
     if (enable) {
-        val |= (1 << 0 | 1 << 1);
+        val |= (1u << 0 | 1u << 1);
     } else {
-        val &= ~(1 << 0 | 1 << 1);
+        val &= ~(1u << 0 | 1u << 1);
     }
     txWrite(MHUv2_SND_INT_EN_OFFS, val);
 }
@@ -197,12 +197,12 @@
     if (tx) {
         aidr = getTxAIDR();
         a    = reinterpret_cast<struct aidr_t *>(&aidr);
-        LOG("TX MHUv2 reports: Major rev: %d, Minor rev: %d", a->ARCH_MAJOR_REV, a->ARCH_MINOR_REV);
+        LOG("TX MHUv2 reports: Major rev: %u, Minor rev: %u", a->ARCH_MAJOR_REV, a->ARCH_MINOR_REV);
     }
     if (rx) {
         aidr = getRxAIDR();
         a    = reinterpret_cast<struct aidr_t *>(&aidr);
-        LOG("RX MHUv2 reports: Major rev: %d, Minor rev: %d", a->ARCH_MAJOR_REV, a->ARCH_MINOR_REV);
+        LOG("RX MHUv2 reports: Major rev: %u, Minor rev: %u", a->ARCH_MAJOR_REV, a->ARCH_MINOR_REV);
     }
 }