tf-psa-crypto: cmake: Fix p-256 installation

Signed-off-by: Ronald Cron <ronald.cron@arm.com>
diff --git a/tf-psa-crypto/drivers/p256-m/CMakeLists.txt b/tf-psa-crypto/drivers/p256-m/CMakeLists.txt
index bc53a5e..ede2831 100644
--- a/tf-psa-crypto/drivers/p256-m/CMakeLists.txt
+++ b/tf-psa-crypto/drivers/p256-m/CMakeLists.txt
@@ -29,7 +29,7 @@
 
 if(INSTALL_TF_PSA_CRYPTO_HEADERS)
 
-  install(DIRECTORY :${CMAKE_CURRENT_SOURCE_DIR}
+  install(DIRECTORY p256-m
     DESTINATION include
     FILE_PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ
     DIRECTORY_PERMISSIONS OWNER_READ OWNER_WRITE OWNER_EXECUTE GROUP_READ GROUP_EXECUTE WORLD_READ WORLD_EXECUTE
@@ -38,6 +38,6 @@
 endif(INSTALL_TF_PSA_CRYPTO_HEADERS)
 
 install(TARGETS ${p256m_target}
-EXPORT MbedTLSTargets
-DESTINATION ${CMAKE_INSTALL_LIBDIR}
-PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)
+  EXPORT MbedTLSTargets
+  DESTINATION ${CMAKE_INSTALL_LIBDIR}
+  PERMISSIONS OWNER_READ OWNER_WRITE GROUP_READ WORLD_READ)