mmc: remove the hard setting for tran_speed

mmc_set_clock is set to the hard-coding.
But i think good that use the tran_speed value.
Signed-off-by: NJaehoon Chung <jh80.chung@samsung.com>
Signed-off-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NAndy Fleming <afleming@freescale.com>

drivers/mmc/mmc.c

@@ -1195,9 +1195,9 @@ int mmc_startup(struct mmc *mmc)
 		}
 
 		if (mmc->card_caps & MMC_MODE_HS)
-			mmc_set_clock(mmc, 50000000);
+			mmc->tran_speed = 50000000;
 		else
-			mmc_set_clock(mmc, 25000000);
+			mmc->tran_speed = 25000000;
 	} else {
 		width = ((mmc->host_caps & MMC_MODE_MASK_WIDTH_BITS) >>
 			 MMC_MODE_WIDTH_BITS_SHIFT);
@@ -1234,13 +1234,14 @@ int mmc_startup(struct mmc *mmc)
 
 		if (mmc->card_caps & MMC_MODE_HS) {
 			if (mmc->card_caps & MMC_MODE_HS_52MHz)
-				mmc_set_clock(mmc, 52000000);
+				mmc->tran_speed = 52000000;
 			else
-				mmc_set_clock(mmc, 26000000);
-		} else
-			mmc_set_clock(mmc, 20000000);
+				mmc->tran_speed = 26000000;
+		}
 	}
 
+	mmc_set_clock(mmc, mmc->tran_speed);
+
 	/* fill in device description */
 	mmc->block_dev.lun = 0;
 	mmc->block_dev.type = 0;