MMC_CARD_BUSY
if (cmd->resp[0] & MMC_CARD_BUSY) {
} else if (cmd->resp[0] & MMC_CARD_BUSY) {
if (cmd.resp[1] & MMC_CARD_BUSY)
if (cmd.resp[0] & MMC_CARD_BUSY)
if (resp & MMC_CARD_BUSY)