tgotic 36fcb4b3a1 SPI fix DMA rxbuf size calculation ...

(x+31)/8 doesn't round to 4 bytes (32 bits), e.g. (16+31)/8=47/8=5,
where ((x+31)/32)*4 does round to 4 bytes: (16+31)/32=(47/32)*4=1*4=4

2022-11-30 11:46:18 +08:00

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