Use PRIu32 to print uint32_t variable

As the variable underlying type size is different depending on the
toolchain used

Author: hugueskamba

features/cellular/framework/AT/ATHandler.cpp

@@ -1365,7 +1365,7 @@ void ATHandler::write_int(int32_t param)
     // write the integer subparameter
     const int32_t str_len = 12;
     char number_string[str_len];
-    int32_t result = sprintf(number_string, "%ld", param);
+    int32_t result = sprintf(number_string, "%" PRIi32, param);
     if (result > 0 && result < str_len) {
         (void)write(number_string, strlen(number_string));
     }

features/frameworks/TARGET_PSA/val_greentea.cpp

@@ -67,7 +67,7 @@ val_status_t mbed_val_execute_non_secure_tests(uint32_t test_num, client_test_t
     while (tests_list[i] != NULL)
     {
         memset(testcase_name, 0, 100);
-        sprintf(testcase_name, "Check%d", i);
+        sprintf(testcase_name, "Check%" PRIu32, i);
         GREENTEA_TESTCASE_START(testcase_name);
         if (server_hs == TRUE)
         {

platform/source/mbed_error.c

@@ -305,7 +305,7 @@ WEAK MBED_NORETURN mbed_error_status_t mbed_error(mbed_error_status_t error_stat
     mbed_error_printf("\n= System will be rebooted due to a fatal error =\n");
     if (report_error_ctx->error_reboot_count >= MBED_CONF_PLATFORM_ERROR_REBOOT_MAX) {
         //We have rebooted more than enough, hold the system here.
-        mbed_error_printf("= Reboot count(=%ld) reached maximum, system will halt after rebooting =\n", report_error_ctx->error_reboot_count);
+        mbed_error_printf("= Reboot count(=%" PRIi32") reached maximum, system will halt after rebooting =\n", report_error_ctx->error_reboot_count);
     }
 #endif
     system_reset();//do a system reset to get the system rebooted