[COMMITTED PATCH] Define a BUSY_WAIT_NOP for sparc.

[David Miller]

From: Roland McGrath <roland@hack.frob.com>
Date: Mon, 29 Oct 2012 11:30:26 -0700 (PDT)

>> +/* Delay in spinlock loop.  */
>> +extern void __cpu_relax(void);
>> +#define BUSY_WAIT_NOP	__cpu_relax()
> 
> Should be some spaces in thar.

I'll fix this up, thanks Roland.