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SDHC controller in AMD chipsets require SDHC transfer mode register to be cleared for commands without data. The issue was uncovered during testing eMMC cards on KB/ML based platforms Signed-off-by: Vincent Wan <vincent.wan@amd.com> Signed-off-by: Wan Zongshun <mcuos.com@gmail.com> Signed-off-by: Arindam Nath <arindam.nath@amd.com> Tested-by: Vikram B <vikram.b@amd.com> Tested-by: Raghavendra Swamy <raghavendra.swamy@amd.com> Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>