mainboard: complete the sb800 devicetree even device is off

sb800 cimx entry sb_Before_Pci_Init was called in the device 16.2
enable_dev() function. If the devicetree don't have this device,
then sb_Before_Pci_Init will not get called.

Change-Id: I76ebad842e90b0f740abbec031165d7c39a80abf
Signed-off-by: Kerry Sheh <kerry.she@amd.com>
Signed-off-by: Kerry Sheh <shekairui@gmail.com>
Reviewed-on: http://review.coreboot.org/230
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marcj303@gmail.com>
3 files changed