[AGPGART] Fix up sgi-agp bug with no devices on bus.
[AGPGART] Fix up sgi-agp bug with no devices on bus.

Signed-off-by: Eric Kunze <db0e2c245a6e25773e986a92b5f7ba5d31e3d72c@sgi.com>
Signed-off-by: Dave Jones <d5ec0d24602845f6f4b6a35ef729998d1fba5507@redhat.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs