Fix DMA_TCD_NBYTES_MLOFFNO_NBYTES

teensy3/kinetis.h

 #define DMA_TCD_CITER_ELINKYES_CITER_MASK	0x01FF
 #define DMA_TCD_NBYTES_SMLOE		    ((uint32_t)1<<31)		    // Source Minor Loop Offset Enable
 #define DMA_TCD_NBYTES_DMLOE		    ((uint32_t)1<<30)		    // Destination Minor Loop Offset Enable
-#define DMA_TCD_NBYTES_MLOFFNO_NBYTES(n)    ((uint32_t)(n))		    // NBytes transfer count when minor loop disabled
-#define DMA_TCD_NBYTES_MLOFFYES_NBYTES(n)   ((uint32_t)(n & 0x1F))	    // NBytes transfer count when minor loop enabled
-#define DMA_TCD_NBYTES_MLOFFYES_MLOFF(n)    ((uint32_t)(n & 0xFFFFF)<<10)   // Offset
+#define DMA_TCD_NBYTES_MLOFFNO_NBYTES(n)    ((uint32_t)((n) & 0x3FFFFFFF))  // NBytes transfer count when minor loop disabled
+#define DMA_TCD_NBYTES_MLOFFYES_NBYTES(n)   ((uint32_t)((n) & 0x1F))	    // NBytes transfer count when minor loop enabled
+#define DMA_TCD_NBYTES_MLOFFYES_MLOFF(n)    ((uint32_t)((n) & 0xFFFFF)<<10) // Minor loop offset
 
 #if DMA_NUM_CHANNELS >= 4
 #define DMA_TCD0_SADDR		(*(volatile const void * volatile *)0x40009000) // TCD Source Address