v1.1.0-RC6

Run the same 6.18 kernel as Rebuild, with the panel driven by simpledrm
from the framebuffer U-Boot handed over.

- kernel deb matched to Rebuild; now published to feeds, so a clean
  checkout builds correctly (the wget previously 404'd)
- DTB regenerated with framebuffer-lcd removed
- end the deferred fbcon takeover before drawing, so Reflash's own UI
  reaches the panel at all - console=serial meant nothing ever released
  it, and simpledrm only scans out once a client enables the CRTC
- rotate-screen writes both connector names, so it can still rotate an
  older sun4i-based Rebuild image as well as a simpledrm one
- U-Boot stdout/stderr to serial after the splash
- image build hardened: copy the kernel deb by name rather than globbing

Verified on Recore A8: panel comes up on its own after boot and updates
during a flash.