Comment 508 for bug 752542

Sony VPC-Z21:
radeon driver is not working with this machine.

[drm] initializing kernel modesetting (TURKS 0x1002:0x6740 0x104D:0x9084).
[ 5.832900] [drm] register mmio base: 0xC0200000
[ 5.832902] [drm] register mmio size: 131072
[ 5.832986] radeon 0000:16:00.0: Invalid ROM contents
[ 5.833179] radeon 0000:16:00.0: Invalid ROM contents
[ 5.833235] [drm:radeon_get_bios] *ERROR* Unable to locate a BIOS ROM
[ 5.833272] radeon 0000:16:00.0: Fatal error during GPU init
[ 5.833305] [drm] radeon: finishing device.
[ 5.834407] radeon 0000:16:00.0: no bo for sa manager
[ 5.834704] radeon: probe of 0000:16:00.0 failed with error -22