Add directive __SIMPLE_DEVICE__

The tests for __PRE_RAM__ or __SMM__ were repeatedly used
for detection if dev->ops in the devicetree are not available
and simple device model functions need be used.

If a source file build for ramstage had __PRE_RAM__ inserted
at the beginning, the struct device would no longer match the
allocation the object had taken. This problem is fixed by
replacing such cases with explicit __SIMPLE_DEVICE__.

Change-Id: Ib74c9b2d8753e6e37e1a23fcfaa2f3657790d4c0
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: http://review.coreboot.org/3555
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@google.com>

src/include/device/pci_ops.h

@@ -1,11 +1,11 @@
 #ifndef PCI_OPS_H
 #define PCI_OPS_H
 
-#ifndef __SMM__
 #include <stdint.h>
 #include <device/device.h>
 #include <arch/pci_ops.h>
 
+#ifndef __SIMPLE_DEVICE__
 u8 pci_read_config8(device_t dev, unsigned int where);
 u16 pci_read_config16(device_t dev, unsigned int where);
 u32 pci_read_config32(device_t dev, unsigned int where);