sdmmc on Kirkwood?

[John Klos <john%ziaspace.com@localhost>]

I have a number of PogoPlugs running as NAT routers, DNS servers, et 
cetera. I've hardly had to touch them - they just run forever. I decided 
to update one of them to netbsd-8 from a week ago. This one is a PogoPlug 
v4 with a SATA port, with root on a SATA SSD.

Even though it has been compiled with MVSDIO_MAX_CLOCK="(19 * 1000)", and 
even though there's no SD card in the slot, dmesg shows a constant stream 
of the following with a continuous 10% system load:

sdmmc0: sdmmc_mem_enable failed with error 60

Inserting an SD card brings the system load to about 95%, and the machine 
runs noticeably slower. The error messages stay the same - no SD card is 
recognized.

Does anyone have any thoughts about what might've changed to cause this 
issue, or what I can try to see about fixing it?

Thanks,
John