mmc: renesas_sdhi: improve TAP selection if all TAPs are good

When tuning HS400, if all TAPS are good, we can utilize the SMPCMP
register to select the optimal TAP. For that, we populate a second
bitmap with SMPCMP results and query it in case the regular bitmap is
full (= all good).

Signed-off-by: Masaharu Hayakawa <[email protected]>
Signed-off-by: Takeshi Saito <[email protected]>
Signed-off-by: Wolfram Sang <[email protected]>
Reviewed-by: Yoshihiro Shimoda <[email protected]>
Tested-by: Yoshihiro Shimoda <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Ulf Hansson <[email protected]>

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