soc/amd/stoneyridge: Use __packed

__packed has been introduced in commit 6a00113de8
("Rename __attribute__((packed)) --> __packed"). Use it.

Change-Id: Ie654567ebff884b911de10bd9fef605436e72af8
Signed-off-by: Jonathan Neuschäfer <j.neuschaefer@gmx.net>
Reviewed-on: https://review.coreboot.org/21346
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martinroth@google.com>

src/soc/amd/stoneyridge/include/soc/nvs.h

@@ -24,6 +24,7 @@
 #ifndef __SOC_STONEYRIDGE_NVS_H__
 #define __SOC_STONEYRIDGE_NVS_H__
 
+#include <compiler.h>
 #include <stdint.h>
 #include <vendorcode/google/chromeos/gnvs.h>
 
@@ -46,6 +47,6 @@ typedef struct global_nvs_t {
 
 	/* ChromeOS specific (0x100 - 0xfff) */
 	chromeos_acpi_t chromeos;
-} __attribute__((packed)) global_nvs_t;
+} __packed global_nvs_t;
 
 #endif /* __SOC_STONEYRIDGE_NVS_H__ */