Ghost EDD devices in /sys again

[Andrey Borzenkov]

This is regression but old enough. Apparently I had for whatever reasons
EDD turned off till recently. This is 2.6.27-rc5 just in case.

In 2006 I fixed ghost devices due to buggy BIOS:

http://marc.info/?l=linux-kernel&m=114087765422490&w=2

Later edd.S has been rewritten in C, and apparently this patch has been
lost:

{pts/1}% ls /sys/firmware/edd
int13_dev80/  int13_dev84/  int13_dev88/  int13_dev8c/
int13_dev81/  int13_dev85/  int13_dev89/  int13_dev8d/
int13_dev82/  int13_dev86/  int13_dev8a/  int13_dev8e/
int13_dev83/  int13_dev87/  int13_dev8b/  int13_dev8f/

But I have just a single disk. This is the same system BTW.

Unfortunately I do not speak asm language of C; if somebody could provide
equivalent fix for current edd.c, I am more than ready to test it.

Thank you

-andrey

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