configure: Remove -lxencall for Xen detection

QEMU does not depends on libxencall, it was added because it was a
missing link dependency of libxendevicemodel, but now the later should
be built properly.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Stefano Stabellini <sstabellini@kernel.org>
1 file changed