[MIPS] Fix dcache_status() You can't judge UNCACHED by Config.K0 LSB. Signed-off-by: Shinya Kuribayashi <skuribay@ruby.dti.ne.jp>

diff --git a/cpu/mips/cache.S b/cpu/mips/cache.S
index bb42616..e6f3175 100644
--- a/cpu/mips/cache.S
+++ b/cpu/mips/cache.S

@@ -256,9 +256,13 @@
 *
 */
 LEAF(dcache_status)
-	mfc0	v0, CP0_CONFIG
-	andi	v0, v0, 1
-	j	ra
+	mfc0	t0, CP0_CONFIG
+	li	t1, CONF_CM_UNCACHED
+	andi	t0, t0, CONF_CM_CMASK
+	move	v0, zero
+	beq	t0, t1, 2f
+	li	v0, 1
+2:	jr	ra
 	END(dcache_status)
 
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