MMC: Remove extra diviso increase

As noted by Kyungmin Park, the divisor calculation has
an unnecessary increase.
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/mmc/host/omap.c

@@ -935,7 +935,6 @@ static int mmc_omap_calc_divisor(struct mmc_host *mmc, struct mmc_ios *ios)
 
 	if (dsor > 250)
 		dsor = 250;
-	dsor++;
 
 	if (ios->bus_width == MMC_BUS_WIDTH_4)
 		dsor |= 1 << 15;