mmc: dw_mmc: hi3798cv200: use common_caps

The capabilities for all instances are the same, so use common_caps
instead of caps/num_caps to remove the dependency on the mshcN device
tree alias.

Signed-off-by: John Keeping <john@metanate.com>
Reviewed-by: Jaehoon Chung <jh80.chung@samsung.com>
Link: https://lore.kernel.org/r/20211124184603.3897245-3-john@metanate.com


Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>