drivers/hv: replace enum hv_message_type by u32

enum hv_message_type inside struct hv_message, hv_post_message
is not size portable. Replace enum by u32.
Signed-off-by: NAndrey Smetanin <asmetanin@virtuozzo.com>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: "K. Y. Srinivasan" <kys@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Vitaly Kuznetsov <vkuznets@redhat.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
CC: qemu-devel@nongnu.org
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

drivers/hv/hyperv_vmbus.h

@@ -174,7 +174,7 @@ union hv_message_flags {
 
 /* Define synthetic interrupt controller message header. */
 struct hv_message_header {
-	enum hv_message_type message_type;
+	u32 message_type;
 	u8 payload_size;
 	union hv_message_flags message_flags;
 	u8 reserved[2];
@@ -347,7 +347,7 @@ enum hv_call_code {
 struct hv_input_post_message {
 	union hv_connection_id connectionid;
 	u32 reserved;
-	enum hv_message_type message_type;
+	u32 message_type;
 	u32 payload_size;
 	u64 payload[HV_MESSAGE_PAYLOAD_QWORD_COUNT];
 };