sh4: move reset_cpu() from watchdog.c to cpu.c

The next patch will remove all the other code from watchdog.c, which
would leave just this function in there. It seems just as natural for
this function to be defined in cpu.c, allowing us to delete watchdog.c
completely.

Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Stefan Roese <sr@denx.de>

arch/sh/cpu/sh4/cpu.c

@@ -10,6 +10,16 @@
 #include <net.h>
 #include <netdev.h>
 #include <asm/processor.h>
+#include <asm/system.h>
+
+void reset_cpu(void)
+{
+	/* Address error with SR.BL=1 first. */
+	trigger_address_error();
+
+	while (1)
+		;
+}
 
 int checkcpu(void)
 {

arch/sh/cpu/sh4/watchdog.c

@@ -49,12 +49,3 @@ int watchdog_disable(void)
 	return 0;
 }
 #endif
-
-void reset_cpu(void)
-{
-	/* Address error with SR.BL=1 first. */
-	trigger_address_error();
-
-	while (1)
-		;
-}