spi: sh-msiof: fix *info pointer in request_dma()

sh_msiof_spi_info *info struct pointer was initialized in the probe() function
no need to get back and keep consistency.

Signed-off-by: Hoan Nguyen An <na-hoan@jinso.co.jp>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>