psa: fix some macro definition

Signed-off-by: Valerio Setti <valerio.setti@nordicsemi.no>
diff --git a/include/psa/crypto_sizes.h b/include/psa/crypto_sizes.h
index 892bfa3..87b8c39 100644
--- a/include/psa/crypto_sizes.h
+++ b/include/psa/crypto_sizes.h
@@ -1039,8 +1039,8 @@
 #endif
 
 #define PSA_EXPORT_KEY_PAIR_OR_PUBLIC_MAX_SIZE \
-    (PSA_EXPORT_KEY_PAIR_MAX_SIZE > PSA_EXPORT_PUBLIC_KEY_MAX_SIZE) ? \
-    PSA_EXPORT_KEY_PAIR_MAX_SIZE : PSA_EXPORT_PUBLIC_KEY_MAX_SIZE
+    ((PSA_EXPORT_KEY_PAIR_MAX_SIZE > PSA_EXPORT_PUBLIC_KEY_MAX_SIZE) ? \
+     PSA_EXPORT_KEY_PAIR_MAX_SIZE : PSA_EXPORT_PUBLIC_KEY_MAX_SIZE)
 
 /** Sufficient output buffer size for psa_raw_key_agreement().
  *