sparc64: cleanup: Rename ret_from_syscall to ret_from_fork

Rename to make the function name better conform to its goal.

Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
CC: David Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/kernel/kgdb_64.c b/arch/sparc/kernel/kgdb_64.c
index c875955..53c0a82 100644
--- a/arch/sparc/kernel/kgdb_64.c
+++ b/arch/sparc/kernel/kgdb_64.c
@@ -42,7 +42,7 @@
 {
 	struct thread_info *t = task_thread_info(p);
 	extern unsigned int switch_to_pc;
-	extern unsigned int ret_from_syscall;
+	extern unsigned int ret_from_fork;
 	struct reg_window *win;
 	unsigned long pc, cwp;
 	int i;
@@ -66,7 +66,7 @@
 		gdb_regs[i] = 0;
 
 	if (t->new_child)
-		pc = (unsigned long) &ret_from_syscall;
+		pc = (unsigned long) &ret_from_fork;
 	else
 		pc = (unsigned long) &switch_to_pc;