bsps/imxrt: Enable DMA clock

The EDMA is intialized so make sure the the clock is initialized too.

Update #4180

bsps/arm/imxrt/start/bspstarthooks.c

@@ -48,4 +48,7 @@ BSP_START_TEXT_SECTION void bsp_start_hook_1(void)
 
   /* Reduce frequency for I2C */
   CLOCK_SetDiv(kCLOCK_Lpi2cDiv, 5);
+
+  /* Enable EDMA clock. We initialize the EDMA so we need the clock. */
+  CLOCK_EnableClock(kCLOCK_Dma);
 }