swiotlb-xen: arrange to have buffer info logged

I consider it unhelpful that address and size of the buffer aren't put
in the log file; it makes diagnosing issues needlessly harder. The
majority of callers of swiotlb_init() also passes 1 for the "verbose"
parameter.

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>

Link: https://lore.kernel.org/r/2e3c8e68-36b2-4ae9-b829-bf7f75d39d47@suse.com


Signed-off-by: Juergen Gross <jgross@suse.com>