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/include/device/pci.h

@@ -57,7 +57,7 @@ struct pci_driver {
 	const unsigned short *devices;
 };
 
-#define __pci_driver __attribute__ ((used, __section__(".rodata.pci_driver")))
+#define __pci_driver __attribute__((used, __section__(".rodata.pci_driver")))
 /** start of compile time generated pci driver array */
 extern struct pci_driver _pci_drivers[];
 /** end of compile time generated pci driver array */