From 996903de92f0c7a32d8c83f37d7ebcea0def8660 Mon Sep 17 00:00:00 2001
From: Minda Chen <Minda.Chen@csr.com>
Date: Wed, 26 Nov 2014 13:05:33 +0800
Subject: [PATCH] mmc: core: add core-level function for sending tuning
 commands

According to the SD card spec, Add a manual tuning command function
for SDR104/HS200.
Sending command 19 or command 21 to read data and compare with the
tunning block pattern.

This patch will help to decrease some platform private codes in SDHCI
platform_execute_tuning() callbacks.

Signed-off-by: Minda Chen <Minda.Chen@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
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