sparc64: cheaper asm/uaccess.h inclusion

sched.h inclusion is definitely not needed like in 32-bit version,
remove it, fixup compilation.

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/samples/kprobes/kretprobe_example.c b/samples/kprobes/kretprobe_example.c
index 4e764b3..1041b67 100644
--- a/samples/kprobes/kretprobe_example.c
+++ b/samples/kprobes/kretprobe_example.c
@@ -23,6 +23,7 @@
 #include <linux/kprobes.h>
 #include <linux/ktime.h>
 #include <linux/limits.h>
+#include <linux/sched.h>
 
 static char func_name[NAME_MAX] = "do_fork";
 module_param_string(func, func_name, NAME_MAX, S_IRUGO);