FIXUP: acpi_def_block
pc: acpi-build: drop remaining ssdt_misc template and use acpi_def_block()

It completes dynamic SSDT generation and makes it
independed of IASL binary blobs. It also hides
from user all pointer arithmetic when building
SSDT which makes resulting code a bit cleaner
and concentrating only on composing ASL construct
/i.e. a task build_ssdt() should be doing/.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>