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/siemens/nc_fpga/nc_fpga.h

@@ -16,6 +16,8 @@
 #ifndef _SIEMENS_NC_FPGA_H_
 #define _SIEMENS_NC_FPGA_H_
 
+#include <compiler.h>
+
 #define NC_MAGIC_OFFSET			0x020
 #define  NC_FPGA_MAGIC			0x4E433746
 #define NC_CAP1_OFFSET			0x080
@@ -64,6 +66,6 @@ typedef struct {
 	uint16_t	hystthreshold;
 	uint16_t	res9[4];
 	uint32_t	fanmon;
-} __attribute__ ((packed)) fan_ctrl_t;
+} __packed fan_ctrl_t;
 
 #endif /* _SIEMENS_NC_FPGA_H_ */