fdisk: move remaining ptes[] code to fdiskdoslabel.c

Signed-off-by: Karel Zak <kzak@redhat.com>
libfdisk: add FDISK_LABEL_FL_REQUIRE_GEOMETRY

Signed-off-by: Karel Zak <kzak@redhat.com>
fdisk: cleanup warnings

Signed-off-by: Karel Zak <kzak@redhat.com>