xen_backend: remove xen_sysdev_init() function
The init function doesn't do anything at all, so we
just omit it.
Cc: sstabellini@kernel.org
Cc: anthony.perard@citrix.com
Cc: xen-devel@lists.xenproject.org
Cc: peter.maydell@linaro.org
Signed-off-by: Mao Zhongyi <maozhongyi@cmss.chinamobile.com>
Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Acked-by: Anthony PERARD <anthony.perard@citrix.com>
Message-id:
20181130093852.20739-21-maozhongyi@cmss.chinamobile.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>