download the patch of sdma for mach-imx directory

[ganboshi]

for linux 2.6.31, the cpu directory plat-mxc have a patch directory sdma for imx25,  but for linux 4.1.15 the cpu directory mach-imx have no patch for sdma,  so where have the sdma  patch for mach-imx i can download. Thanks a lot

[igorpadykov]

Hi Ganbo

compared with old linux, linux 4.1.15 have different sdma code structure

described in Chapter 4 Smart Direct Memory Access (SDMA) API

attached Linux Manual.

Best regards
igor
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