This was inherited from demu, but StdVGA acceleration isn't applicable to
varstored. Drop all the infrastructure, and modify the create_ioreq_server /
map_resource calls to not request creation of a bufioreq interface in Xen.
Replace some raw numbers with appropriate constants.
Port of https://github.com/xapi-project/varstored/commit/c20294b0bf566878744b683001db2c69b03b916f# :
Signed-off-by: BenjiReis benjamin.reis@vates.fr