common: Move reset_cpu() to the CPU header

Move this function out of common.h and into a relevant header file.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/arch/arm/cpu/arm920t/ep93xx/cpu.c b/arch/arm/cpu/arm920t/ep93xx/cpu.c
index 3aae12f..c9ea4e4 100644
--- a/arch/arm/cpu/arm920t/ep93xx/cpu.c
+++ b/arch/arm/cpu/arm920t/ep93xx/cpu.c
@@ -9,6 +9,7 @@
  */
 
 #include <common.h>
+#include <cpu_func.h>
 #include <asm/arch/ep93xx.h>
 #include <asm/io.h>