Modify TFM files to allow them to build on baremetal with Mbed TLS and fix code style.
Also change the include path of crypto_spe.h in crypto_platform.h to allow the former file to be included in library-only builds.

Signed-off-by: Aditya Deshpande <aditya.deshpande@arm.com>
diff --git a/include/psa/crypto_platform.h b/include/psa/crypto_platform.h
index ee41c89..35a42f8 100644
--- a/include/psa/crypto_platform.h
+++ b/include/psa/crypto_platform.h
@@ -83,7 +83,7 @@
  */
 #if defined(MBEDTLS_PSA_CRYPTO_SPM)
 #define PSA_CRYPTO_SECURE 1
-#include "crypto_spe.h"
+#include "../tests/include/spe/crypto_spe.h"
 #endif // MBEDTLS_PSA_CRYPTO_SPM
 
 #if defined(MBEDTLS_PSA_CRYPTO_EXTERNAL_RNG)