SPI fix DMA rxbuf size calculation (IDFGH-8793) #10224
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(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
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(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=14=4