PROCESSOR-SDK-AM335x: eMMC reliable write support

TI的omap_mmchs驱动是否能支持eMMC的reliable write操作

现在multi-block write用的是open ended write,即使用CMD25+CMD12组合写数据

为提高mmc的断电可靠性,希望能使用Pre-defined multi-block write,即先发CMD23(且bit31=1),再发CMD25

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