ACPI: add SDHCI to ACPI platform devices

Add the generic ACPI SDHCI device ID to acpi_platform_device_ids[]
to make the ACPI core create a platform device object for the ACPI
device node of that ID.

[rjw: Added the changelog.]
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>