isiot: Fix to use usdhc2_pads for mmc2

mmc2 in Is.IoT using usdhc1_pads instead usdhc2_pads,
so update the same.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Matteo Lisi <matteo.lisi@engicam.com>
Cc: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

board/engicam/isiotmx6ul/isiotmx6ul.c

@@ -260,7 +260,7 @@ int board_mmc_init(bd_t *bis)
 			break;
 		case 1:
 			imx_iomux_v3_setup_multiple_pads(
-				usdhc1_pads, ARRAY_SIZE(usdhc2_pads));
+				usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
 			gpio_direction_input(USDHC2_CD_GPIO);
 			usdhc_cfg[i].sdhc_clk = mxc_get_clock(MXC_ESDHC2_CLK);
 			break;