kernel: Move REPEAT_BYTE definition into linux/kernel.h

And make sure that everything using it explicitly includes
that header file.

Signed-off-by: David S. Miller <davem@davemloft.net>

arch/sparc/lib/usercopy.c

@@ -1,5 +1,6 @@
 #include <linux/module.h>
 #include <linux/uaccess.h>
+#include <linux/kernel.h>
 #include <linux/errno.h>
 #include <linux/bug.h>
 
@@ -11,8 +12,6 @@ void copy_from_user_overflow(void)
 }
 EXPORT_SYMBOL(copy_from_user_overflow);
 
-#define REPEAT_BYTE(x)	((~0ul / 0xff) * (x))
-
 static inline long find_zero(unsigned long mask)
 {
 	long byte = 0;