svga: add missing cases for PIPE_CAP_x queries

Return 0 for features we don't support.  Added debug_printf()
warnings when we fail to handle a new PIPE_CAP_x case.  That will
alert us to interfaces changes in the future.  We don't want to
just ignore new PIPE_CAPs and possibly miss something important.

Reviewed-by: José Fonseca <jfonseca@vmware.com>
1 file changed