Found this problem while enabling queued rwlock on SPARC.
The parameter CONFIG_CPU_BIG_ENDIAN is used to clear the
specific byte in qrwlock structure. Without this parameter,
we clear the wrong byte. Here is the code.

static inline u8 *__qrwlock_write_byte(struct qrwlock *lock)
 {
	return (u8 *)lock + 3 * IS_BUILTIN(CONFIG_CPU_BIG_ENDIAN);
 }

Define CPU_BIG_ENDIAN for SPARC to fix it.
Signed-off-by: NBabu Moger <babu.moger@oracle.com>
Reviewed-by: NHåkon Bugge <haakon.bugge@oracle.com>
Reviewed-by: NJane Chu <jane.chu@oracle.com>
Reviewed-by: NShannon Nelson <shannon.nelson@oracle.com>
Reviewed-by: NVijay Kumar <vijay.ac.kumar@oracle.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>