drm/radeon: protect ACPI calls with CONFIG_ACPI
drm/radeon: protect ACPI calls with CONFIG_ACPI

Signed-off-by: Stephen Rothwell <4bf0fb350827ce8d86875e76c923a478597c3cef@canb.auug.org.au>
Acked-by: Alex Deucher <51491341ca073a406db997440d5edb170930fcee@amd.com>
Signed-off-by: Dave Airlie <f2295d84e358395675bc8031be58672073ae065e@gmail.com>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs