Rename __attribute__((packed)) --> __packed

Also unify __attribute__ ((..)) to __attribute__((..)) and
handle ((__packed__)) like ((packed))

Change-Id: Ie60a51c3fa92b5009724a5b7c2932e361bf3490c
Signed-off-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-on: https://review.coreboot.org/15921
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
diff --git a/src/device/oprom/yabel/device.c b/src/device/oprom/yabel/device.c
index b3e5d19..cd1abfb 100644
--- a/src/device/oprom/yabel/device.c
+++ b/src/device/oprom/yabel/device.c
@@ -33,6 +33,7 @@
  *****************************************************************************/
 
 
+#include <compiler.h>
 #include "device.h"
 #include "compat/rtas.h"
 #include <string.h>
@@ -56,7 +57,7 @@
 	u8 cfg_space_offset;
 	u64 address;
 	u64 size;
-} __attribute__ ((__packed__)) assigned_address_t;
+} __packed assigned_address_t;
 
 #if IS_ENABLED(CONFIG_PCI_OPTION_ROM_RUN_YABEL)
 /* coreboot version */