ARM: EXYNOS: Remove unused header file from pm_domains.c

plat/devs.h is not required in this file.
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

arch/arm/mach-exynos/pm_domains.c

@@ -22,8 +22,6 @@
 #include <linux/of_platform.h>
 #include <linux/sched.h>
 
-#include <plat/devs.h>
-
 #include "regs-pmu.h"
 
 /*