uboot-imx

mmc: renesas-sdhi: Use priv directly

The dev_get_priv(dev) is used twice in the probe function.
Replace the second invocation with priv variable.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>