ARM: uniphier: remove unused uniphier_ld11_boot_device_fixup()

The .boot_device_fixup() is only called by SPL.

Now that 64-bit SoCs of this SoC family no longer support SPL,
debug-uart-ld20.c is never compiled.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
3 files changed