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/commonlib/fsp_relocate.c

@@ -13,6 +13,7 @@
  * GNU General Public License for more details.
  */
 
+#include <compiler.h>
 #include <console/console.h>
 #include <commonlib/endian.h>
 #include <commonlib/fsp.h>
@@ -67,7 +68,7 @@ struct fsp_patch_table {
 	uint8_t reserved;
 	uint32_t patch_entry_num;
 	uint32_t patch_entries[0];
-} __attribute__((packed));
+} __packed;
 
 #define FSPP_SIG 0x50505346