sunxi: Add packed attribute to struct sunxi_prcm_reg

struct sunxi_prcm_reg is a representation of the PRCM registers. Add
the packed attribute to prevent the compiler from doing funny things.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

arch/arm/include/asm/arch-sunxi/prcm.h

@@ -197,7 +197,9 @@
 #define PRCM_CPU3_PWR_CLAMP_MASK PRCM_CPU3_PWR_CLAMP(0xff)
 
 #ifndef __ASSEMBLY__
-struct sunxi_prcm_reg {
+#include <linux/compiler.h>
+
+struct __packed sunxi_prcm_reg {
 	u32 cpus_cfg;		/* 0x000 */
 	u8 res0[0x8];		/* 0x004 */
 	u32 apb0_ratio;		/* 0x00c */