ARM: config: aspeed-g5: Enable 8250_DW quirks

This driver option is used by the AST2600 A0 boards to work around a
hardware issue.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Joel Stanley <joel@jms.id.au>