libefivar: use sysmacros.h
libefivar: use sysmacros.h

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

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