Fix parantheses on return and sizeof statements.

Used script:
```
import re
import sys

for arg in sys.argv[1:]:
    print(arg)
    with open(arg, 'r') as file:
        content = file.read()
        content = re.sub(r"return\s?\((?!.*\).*\()\s*\n?(.*)\n?\);", r"return \1;", \
            content, flags = re.M)
        content = re.sub(r"sizeof ([^\(][a-zA-Z0-9_\[\]]*)", r"sizeof(\1)",\
            content, flags = re.M)
    with open(arg, 'w') as file:
        file.write(content)

```
Executed with:
` find . -regextype posix-egrep -regex ".*\.([hc]|fmt|function)" | xargs -L1 python script.py`

Signed-off-by: Mateusz Starzyk <mateusz.starzyk@mobica.com>
diff --git a/tests/src/psa_crypto_helpers.c b/tests/src/psa_crypto_helpers.c
index d9d841a..cef4093 100644
--- a/tests/src/psa_crypto_helpers.c
+++ b/tests/src/psa_crypto_helpers.c
@@ -42,18 +42,18 @@
         PSA_MAX_PERSISTENT_KEY_IDENTIFIER )
     {
         /* Don't touch key id values that designate non-key files. */
-        return( 1 );
+        return 1 ;
     }
     for( i = 0; i < num_key_ids_used ; i++ )
     {
         if( mbedtls_svc_key_id_equal( key_id, key_ids_used_in_test[i] ) )
-            return( 1 );
+            return 1 ;
     }
     if( num_key_ids_used == ARRAY_LENGTH( key_ids_used_in_test ) )
-        return( 0 );
+        return 0 ;
     key_ids_used_in_test[num_key_ids_used] = key_id;
     ++num_key_ids_used;
-    return( 1 );
+    return 1 ;
 }
 
 void mbedtls_test_psa_purge_key_storage( void )
@@ -80,17 +80,17 @@
     mbedtls_psa_get_stats( &stats );
 
     if( stats.volatile_slots != 0 )
-        return( "A volatile slot has not been closed properly." );
+        return "A volatile slot has not been closed properly." ;
     if( stats.persistent_slots != 0 )
-        return( "A persistent slot has not been closed properly." );
+        return "A persistent slot has not been closed properly." ;
     if( stats.external_slots != 0 )
-        return( "An external slot has not been closed properly." );
+        return "An external slot has not been closed properly." ;
      if( stats.half_filled_slots != 0 )
-        return( "A half-filled slot has not been cleared properly." );
+        return "A half-filled slot has not been cleared properly." ;
     if( stats.locked_slots != 0 )
-        return( "Some slots are still marked as locked." );
+        return "Some slots are still marked as locked." ;
 
-    return( NULL );
+    return NULL ;
 }
 
 #if defined(RECORD_PSA_STATUS_COVERAGE_LOG)
@@ -110,7 +110,7 @@
     if( log == NULL )
         log = fopen( STATUS_LOG_FILE_NAME, "a" );
     fprintf( log, "%d:%s:%s:%d:%s\n", (int) status, func, file, line, expr );
-    return( status );
+    return status ;
 }
 #endif /* defined(RECORD_PSA_STATUS_COVERAGE_LOG) */
 
@@ -124,7 +124,7 @@
     if( usage_flags & PSA_KEY_USAGE_VERIFY_HASH )
         updated_usage |= PSA_KEY_USAGE_VERIFY_MESSAGE;
 
-    return( updated_usage );
+    return updated_usage ;
 }
 
 #endif /* MBEDTLS_PSA_CRYPTO_C */