mmc: Drop unused mmc_send_tuning() cmd_error parameter

The cmd_error parameter is not used, remove it.

Signed-off-by: Marek Vasut <marek.vasut+renesas@mailbox.org>
diff --git a/drivers/mmc/fsl_esdhc_imx.c b/drivers/mmc/fsl_esdhc_imx.c
index 7c39c86..b74c014 100644
--- a/drivers/mmc/fsl_esdhc_imx.c
+++ b/drivers/mmc/fsl_esdhc_imx.c
@@ -882,7 +882,7 @@
 		esdhc_write32(&regs->mixctrl, val);
 
 		/* We are using STD tuning, no need to check return value */
-		mmc_send_tuning(mmc, opcode, NULL);
+		mmc_send_tuning(mmc, opcode);
 
 		ctrl = esdhc_read32(&regs->autoc12err);
 		if ((!(ctrl & MIX_CTRL_EXE_TUNE)) &&