fix(st): add U suffix for unsigned numbers

This corrects MISRA c2012-7.2 violation:
A "u" or "U" suffix shall be applied to all integer constants that are
represented in an unsigned type.

Signed-off-by: Yann Gautier <yann.gautier@st.com>
Change-Id: I92b394572528e7179a314bbad4a032fd65053861
diff --git a/plat/st/common/bl2_io_storage.c b/plat/st/common/bl2_io_storage.c
index b271ed6..1bbaff6 100644
--- a/plat/st/common/bl2_io_storage.c
+++ b/plat/st/common/bl2_io_storage.c
@@ -607,7 +607,7 @@
  *     - we already boot FWU_MAX_TRIAL_REBOOT times in trial mode.
  * we select the previous_active_index.
  */
-#define INVALID_BOOT_IDX		0xFFFFFFFF
+#define INVALID_BOOT_IDX		0xFFFFFFFFU
 
 uint32_t plat_fwu_get_boot_idx(void)
 {
diff --git a/plat/st/common/include/stm32mp_efi.h b/plat/st/common/include/stm32mp_efi.h
index 490560f..af9165f 100644
--- a/plat/st/common/include/stm32mp_efi.h
+++ b/plat/st/common/include/stm32mp_efi.h
@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: BSD-3-Clause */
 /*
  * Copyright (c) 2021, Linaro Limited
+ * Copyright (c) 2022, STMicroelectronics - All Rights Reserved
  */
 
 #ifndef STM32MP_EFI_H
@@ -9,7 +10,7 @@
 #include <drivers/partition/efi.h>
 
 #define STM32MP_FIP_GUID \
-	EFI_GUID(0x19d5df83, 0x11b0, 0x457b, \
-		 0xbe, 0x2c, 0x75, 0x59, 0xc1, 0x31, 0x42, 0xa5)
+	EFI_GUID(0x19d5df83U, 0x11b0U, 0x457bU, \
+		 0xbeU, 0x2cU, 0x75U, 0x59U, 0xc1U, 0x31U, 0x42U, 0xa5U)
 
 #endif /* STM32MP_EFI_H */