soc/intel: Change file to __SIMPLE_DEVICE__

All the PCI accesses in the file are now accessed
without SA_DEV_ROOT expanding to function call.

Change-Id: I30d331e9c18a486ea971e8397a6e20a0f82d5f84
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34410
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/soc/intel/common/block/systemagent/systemagent_early.c

@@ -13,6 +13,8 @@
  * GNU General Public License for more details.
  */
 
+#define __SIMPLE_DEVICE__
+
 #include <device/mmio.h>
 #include <device/pci_ops.h>
 #include <device/device.h>
@@ -24,7 +26,6 @@
 
 #include "systemagent_def.h"
 
-#if ENV_BOOTBLOCK
 void bootblock_systemagent_early_init(void)
 {
 	uint32_t reg;
@@ -63,7 +64,6 @@ void bootblock_systemagent_early_init(void)
 	 */
 	pci_write_config32(SA_DEV_ROOT, TSEG, 0);
 }
-#endif
 
 void sa_set_pci_bar(const struct sa_mmio_descriptor *fixed_set_resources,
 		size_t count)