platform: goldfish: Allow goldfish drivers for archs with IOMEM and DMA

We don't need explicit dependency of Goldfish kconfig option on various
architectures. Instead, the Goldfish kconfig option should only depend
on HAS_IOMEM and HAS_DMA which is sufficient for all Goldfish devices.

Signed-off-by: Anup Patel <anup.patel@wdc.com>
Link: https://lore.kernel.org/r/20190925063706.56175-2-anup.patel@wdc.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>