Core: Rename services to partitions in core

To get closer to the terminology used in PSA, the symbols that in the
current TF-M terminology refer to services, should be changed to refer
to partitions. This commit does this renaming in core, and also updates
files that reference the changed symbols.

Change-Id: Id457db3f8876eca39b8055df377533ac73ac7188
Signed-off-by: Mate Toth-Pal <mate.toth-pal@arm.com>
diff --git a/app/tfm_integ_test.c b/app/tfm_integ_test.c
index 4ddf082..5bad17a 100644
--- a/app/tfm_integ_test.c
+++ b/app/tfm_integ_test.c
@@ -29,10 +29,10 @@
             case TFM_SUCCESS: \
                 LOG_MSG("Secure call to " #fn "(" #__VA_ARGS__") successful!");\
                 break; \
-            case TFM_SERVICE_PENDED: \
+            case TFM_PARTITION_PENDED: \
                 LOG_MSG("Secure call to " #fn "(" #__VA_ARGS__") pended!"); \
                 break; \
-            case TFM_ERROR_SERVICE_ALREADY_PENDED: \
+            case TFM_ERROR_PARTITION_ALREADY_PENDED: \
                 LOG_MSG("Secure call to " #fn "(" #__VA_ARGS__") failed, " \
                                                             "already pended!");\
                 break; \