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CMD23 is optional for SD but required for MMC, and the UEFI bootloader used for Windows on Raspberry Pi 2 issues it. Reviewed-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Andrew Baumann <Andrew.Baumann@microsoft.com> Message-id: 1454902521-21164-2-git-send-email-Andrew.Baumann@microsoft.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>