mmc: renesas-sdhi: Add Renesas SDR104/HS200 tuning support

Add code for PHY tuning required for SDR104/HS200 support on Renesas RCar.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Jaehoon Chung <jh80.chung@samsung.com>
Cc: Masahiro Yamada <yamada.masahiro@socionext.com>
1 file changed