Fix typo in tfm_platform.cmake

Change-Id: I5665ac1d06f53d774214fc0a79445df4786cb7a5
Signed-off-by: Kevin Peng <kevin.peng@arm.com>
diff --git a/config/tfm_platform.cmake b/config/tfm_platform.cmake
index 345ad29..13c528b 100644
--- a/config/tfm_platform.cmake
+++ b/config/tfm_platform.cmake
@@ -10,7 +10,7 @@
 if (NOT IS_ABSOLUTE "${TFM_PLATFORM}" AND NOT IS_DIRECTORY "${TARGET_PATH}/${TFM_PLATFORM}")
     # If TFM_PLATFORM is not a relative patch to ${TARGET_PATH}, then it could
     # be a platform name, for example an521. Search directories which contain
-    # the "cpuarch.cmake" and find the the match one.
+    # the "cpuarch.cmake" and find the matching one.
 
     # Get the list of directories which have cpuarch.cmake
     file(GLOB_RECURSE PLATFORM_PATHS ${TARGET_PATH} "cpuarch.cmake")