Build: Fix indentation

Change-Id: I594f20cffa69df2c5935738761115fd318da0d03
Signed-off-by: Chris Brand <chris.brand@cypress.com>
diff --git a/cmake/install.cmake b/cmake/install.cmake
index 1c65610..ab844de 100644
--- a/cmake/install.cmake
+++ b/cmake/install.cmake
@@ -127,8 +127,8 @@
             DESTINATION ${INSTALL_INTERFACE_SRC_DIR})
 endif()
 
-    install(DIRECTORY   ${INTERFACE_INC_DIR}/os_wrapper
-            DESTINATION ${INSTALL_INTERFACE_INC_DIR})
+install(DIRECTORY   ${INTERFACE_INC_DIR}/os_wrapper
+        DESTINATION ${INSTALL_INTERFACE_INC_DIR})
 
 if (CONFIG_TFM_USE_TRUSTZONE)
     install(DIRECTORY   ${INTERFACE_SRC_DIR}/os_wrapper