[SPARC]: Remove legacy stuff from cpu_idle().

Currently sparc and sparc64's UP cpu_idle() checks current pid. This
is old time legacy. Now it's paranoia.
Signed-off-by: Coywolf Qi Hunt <coywolf@lovecn.org>
Acked-by: William Irwin <wli@holomorphy.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/kernel/process.c

@@ -83,9 +83,6 @@ void default_idle(void)
  */
 void cpu_idle(void)
 {
-	if (current->pid != 0)
-		goto out;
-
 	/* endless idle loop with no priority at all */
 	for (;;) {
 		if (ARCH_SUN4C_SUN4) {
@@ -126,8 +123,6 @@ void cpu_idle(void)
 		schedule();
 		check_pgt_cache();
 	}
-out:
-	return;
 }
 
 #else

arch/sparc64/kernel/process.c

@@ -62,9 +62,6 @@ void default_idle(void)
  */
 void cpu_idle(void)
 {
-	if (current->pid != 0)
-		return;
-
 	/* endless idle loop with no priority at all */
 	for (;;) {
 		/* If current->work.need_resched is zero we should really
@@ -80,7 +77,6 @@ void cpu_idle(void)
 		schedule();
 		check_pgt_cache();
 	}
-	return;
 }
 
 #else