hvf: Add missing include

The sysemu/accel.h header is needed for the ACCEL_CLASS_NAME
macro.  This will be necessary to allow us to use OBJECT_DEFINE*()
for TYPE_HVF_ACCEL.

Reviewed-by: Daniel P. Berrangé <berrange@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Tested-By: Roman Bolshakov <r.bolshakov@yadro.com>
Message-Id: <20200825192110.3528606-14-ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>

include/sysemu/hvf.h

@@ -13,6 +13,8 @@
 #ifndef HVF_H
 #define HVF_H
 
+#include "sysemu/accel.h"
+
 #ifdef CONFIG_HVF
 uint32_t hvf_get_supported_cpuid(uint32_t func, uint32_t idx,
                                  int reg);