LIB: Update docs to reflect logging updates

Change-Id: I15093b3b800cbde4f088286e27152117f2f21b2e
Signed-off-by: Jackson Cooper-Driver <jackson.cooper-driver@arm.com>
diff --git a/docs/tfm_erpc_test_build_and_run.rst b/docs/tfm_erpc_test_build_and_run.rst
index ddf539c..4613d34 100644
--- a/docs/tfm_erpc_test_build_and_run.rst
+++ b/docs/tfm_erpc_test_build_and_run.rst
@@ -50,7 +50,7 @@
 +-------------------------+-------------------------------------+
 | MCUBOOT_LOG_LEVEL       | ``OFF``                             |
 +-------------------------+-------------------------------------+
-| TFM_SPM_LOG_LEVEL       | ``TFM_SPM_LOG_LEVEL_SILENCE``       |
+| TFM_SPM_LOG_LEVEL       | ``LOG_LEVEL_NONE``                  |
 +-------------------------+-------------------------------------+
 | TFM_PARTITION_LOG_LEVEL | ``LOG_LEVEL_NONE``                  |
 +-------------------------+-------------------------------------+