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/usb/usb_ch9.h

@@ -17,6 +17,8 @@
 #ifndef USB_CH9_H
 #define USB_CH9_H
 
+#include <compiler.h>
+
 #define USB_DIR_OUT                     0               /* to device */
 #define USB_DIR_IN                      0x80            /* to host */
 
@@ -111,7 +113,7 @@ struct usb_ctrlrequest {
         u16 wValue;
         u16 wIndex;
         u16 wLength;
-} __attribute__ ((packed));
+} __packed;
 
 struct usb_debug_descriptor {
         u8  bLength;