[U-Boot] rkcommon.c: Remove unused rkcommon_spi_to_offset

[Philipp Tomsich]

On Thu, 8 Jun 2017, Tom Rini wrote:

> This function is unused, remove.  Reported by clang-3.8.
>
> Fixes: a1c29d4b43dc ("rockchip: mkimage: set init_boot_size to avoid ...")
> Cc: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> Signed-off-by: Tom Rini <trini at konsulko.com>
> Reviewed-by: Philipp Tomsich <philipp.tomsich at theobroma-systems.com>
> ---

Applied to u-boot-rockchip/master, thanks!