mmc: sdhci-of-arasan: Allow configuring zero tap values
Allow configuring the Output and Input tap values with zero to avoid failures in some cases (one of them is SD boot mode) where the output and input tap values may be already set to non-zero. Fixes: a5c8b2ae ("mmc: sdhci-of-arasan: Add support for ZynqMP Platform Tap Delays Setup") Signed-off-by: NSai Krishna Potthuri <lakshmi.sai.krishna.potthuri@xilinx.com> Signed-off-by: NManish Narani <manish.narani@xilinx.com> Acked-by: NMichal Simek <michal.simek@xilinx.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/1605515565-117562-2-git-send-email-manish.narani@xilinx.comSigned-off-by: NUlf Hansson <ulf.hansson@linaro.org>
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