ACPI suspend type field is 3 bits long

According to ACPI spec table 4-13 suspend type field should be 3 bits
long.

(Gleb Natapov)

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5027 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/hw/acpi.c b/hw/acpi.c
index ef0e097..bdcc425 100644
--- a/hw/acpi.c
+++ b/hw/acpi.c
@@ -145,7 +145,7 @@
             s->pmcntrl = val & ~(SUS_EN);
             if (val & SUS_EN) {
                 /* change suspend type */
-                sus_typ = (val >> 10) & 3;
+                sus_typ = (val >> 10) & 7;
                 switch(sus_typ) {
                 case 0: /* soft power off */
                     qemu_system_shutdown_request();