powerpc/powernv: Use PNV_THREAD_WINKLE macro while requesting for winkle

Signed-off-by: NShreyas B. Prabhu <shreyas@linux.vnet.ibm.com>
Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/idle_power7.S

@@ -252,7 +252,7 @@ _GLOBAL(power7_sleep)
 	/* No return */
 
 _GLOBAL(power7_winkle)
-	li	r3,3
+	li	r3,PNV_THREAD_WINKLE
 	li	r4,1
 	b	power7_powersave_common
 	/* No return */