Example: Use the correct log API of example partition

The secure partition should use the log APIs defined in tfm_sp_log.h,
rather than 'LOG_MSG'.

Signed-off-by: Shawn Shan <Shawn.Shan@arm.com>
Change-Id: If610566a9b5c1f15ad437ae4a78001d814175711
diff --git a/example_partition/CMakeLists.txt b/example_partition/CMakeLists.txt
index 5fd777a..80e35b6 100644
--- a/example_partition/CMakeLists.txt
+++ b/example_partition/CMakeLists.txt
@@ -33,6 +33,7 @@
         tfm_secure_api
         psa_interface
         platform_s
+        tfm_sprt
 )
 
 ############################ Secure API ########################################
diff --git a/example_partition/tfm_example_partition.c b/example_partition/tfm_example_partition.c
index ffaea85..4c1f00d 100644
--- a/example_partition/tfm_example_partition.c
+++ b/example_partition/tfm_example_partition.c
@@ -9,9 +9,9 @@
 
 #include "psa/service.h"
 #include "psa_manifest/tfm_example_partition.h"
-#include "log/tfm_log.h"
 #include "tfm/tfm_spm_services.h"
 #include "tfm_plat_test.h"
+#include "tfm_sp_log.h"
 
 /**
  * \brief An example service implementation that prints out an argument from the
@@ -46,13 +46,13 @@
 
         /* Print arg from client */
         psa_read(msg.handle, 0, &arg, sizeof(arg));
-        LOG_MSG("[Example partition] Service called! arg=%p\r\n", arg);
+        LOG_INFFMT("[Example partition] Service called! arg=%p\r\n", arg);
 
         /* Start timer. The interrupt triggered when it expires will be handled
          * by tfm_example_timer_handler().
          */
         tfm_plat_test_secure_timer_start();
-        LOG_MSG("[Example partition] Timer started...\r\n");
+        LOG_INFFMT("[Example partition] Timer started...\r\n");
 
         status = PSA_SUCCESS;
         break;