qdev: fix OVERFLOW_BEFORE_WIDEN

Potentially overflowing expression "1 << prop->bitnr" with
type "int" (32 bits, signed) is evaluated using 32-bit arithmetic,
and then used in a context that expects an expression of type
"uint64_t" (64 bits, unsigned).

Cc: Gerd Hoffmann <kraxel@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

hw/core/qdev-properties.c

diff --git a/hw/core/qdev-properties.c b/hw/core/qdev-properties.c
index a1606de..f78b335 100644
--- a/hw/core/qdev-properties.c
+++ b/hw/core/qdev-properties.c
@@ -130,7 +130,7 @@
 static uint64_t qdev_get_prop_mask64(Property *prop)
 {
     assert(prop->info == &qdev_prop_bit);
-    return 0x1 << prop->bitnr;
+    return 0x1ull << prop->bitnr;
 }
 
 static void bit64_prop_set(DeviceState *dev, Property *props, bool val)