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>

src/drivers/elog/elog_internal.h

@@ -16,13 +16,14 @@
 #ifndef ELOG_INTERNAL_H_
 #define ELOG_INTERNAL_H_
 
+#include <compiler.h>
 /* ELOG header */
 struct elog_header {
 	u32 magic;
 	u8 version;
 	u8 header_size;
 	u8 reserved[2];
-} __attribute__ ((packed));
+} __packed;
 
 /* ELOG related constants */
 #define ELOG_SIGNATURE			0x474f4c45  /* 'ELOG' */
@@ -40,7 +41,7 @@ struct event_header {
 	u8 hour;
 	u8 minute;
 	u8 second;
-} __attribute__ ((packed));
+} __packed;
 
 /* SMBIOS Type 15 related constants */
 #define ELOG_HEADER_TYPE_OEM		0x88