DSM access: disable fast-seek (closes #16007)

This matches all the other networking access modules and solves performance issues when playing high bitrate content

modules/access/dsm/access.c

@@ -539,12 +539,15 @@ static int Control( access_t *p_access, int i_query, va_list args )
     switch( i_query )
     {
     case ACCESS_CAN_SEEK:
-    case ACCESS_CAN_FASTSEEK:
     case ACCESS_CAN_PAUSE:
     case ACCESS_CAN_CONTROL_PACE:
         *va_arg( args, bool* ) = true;
         break;
 
+    case ACCESS_CAN_FASTSEEK:
+        *va_arg( args, bool* ) = false;
+        break;
+
     case ACCESS_GET_SIZE:
     {
         smb_stat st = smb_stat_fd( p_access->p_sys->p_session,