Revert "mmc: Add a new callback function to perform the 74 clocks cycle sequence"

This reverts commit 318a7a576bc49aa8b4207e694d3fbd48c663d6ac.

The last and only user of this callback had been the omap_hsmmc driver.
It is not used anymore. Removing the callback.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
3 files changed