dp-acpi: improve formatting of AcpiEx() device paths.
dp-acpi: improve formatting of AcpiEx() device paths.

This also fixes a minor scan-build complaint about cidlen being assigned
but not used.

Signed-off-by: Peter Jones <2e0a021e603479ff81838c00c3b770daca4e0214@redhat.com>

vathpela/efivar-devel,rhboot/efivar,rhboot/efivar,rhinstaller/efivar,rhinstaller/efivar