staging: mt7621-mmc: Remove unnecessary BUG_ON() in msdc_dma_setup

The BUG_ON() removed by this patch is just a duplicate of a prior
BUG_ON() statement. There the condition is just clearer, it checks
weather sglen > MAX_BD_NUM and MAX_BD_NUM is equal MAX_BD_PER_GPD. So
this statement can be safely removed.
Signed-off-by: Christian Lütke-Stetzkamp <christian@lkamp.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-mmc/sd.c

@@ -1043,9 +1043,6 @@ static void msdc_dma_setup(struct msdc_host *host, struct msdc_dma *dma,
 
 	N_MSG(DMA, "DMA sglen<%d> xfersz<%d>", sglen, host->xfer_size);
 
-	/* calculate the required number of gpd */
-	BUG_ON(((sglen + MAX_BD_PER_GPD - 1) / MAX_BD_PER_GPD) != 1);
-
 	gpd = dma->gpd;
 	bd  = dma->bd;