vmstate.h: Provide VMSTATE_UINT16_SUB_ARRAY

Provide a VMSTATE_UINT16_SUB_ARRAY macro to save a uint16_t sub-array in
a VMState.
Signed-off-by: NLuc Michel <luc.michel@greensocs.com>
Reviewed-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org>
Message-id: 20180727095421.386-5-luc.michel@greensocs.com
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>

include/migration/vmstate.h

@@ -923,6 +923,9 @@ extern const VMStateInfo vmstate_info_qtailq;
 #define VMSTATE_UINT16_ARRAY(_f, _s, _n)                               \
     VMSTATE_UINT16_ARRAY_V(_f, _s, _n, 0)
 
+#define VMSTATE_UINT16_SUB_ARRAY(_f, _s, _start, _num)                \
+    VMSTATE_SUB_ARRAY(_f, _s, _start, _num, 0, vmstate_info_uint16, uint16_t)
+
 #define VMSTATE_UINT16_2DARRAY(_f, _s, _n1, _n2)                      \
     VMSTATE_UINT16_2DARRAY_V(_f, _s, _n1, _n2, 0)