nitrogen6x: configure SD2 pads for SDIO on USDHC2

Pads SD2_CLK/CMD/DAT0-3 are connected to an SDIO WiFi device on
Nitrogen and unconnected on BD-SL-i.MX6 (sabre lite).

Configure them as SDIO pins to prevent them from being in a state
that confuses the WiFi part.

Signed-off-by: Eric Nelson <eric.nelson@boundarydevices.com>

board/boundary/nitrogen6x/nitrogen6x.c

@@ -124,6 +124,15 @@ struct i2c_pads_info i2c_pad_info2 = {
 	}
 };
 
+static iomux_v3_cfg_t const usdhc2_pads[] = {
+	MX6_PAD_SD2_CLK__SD2_CLK   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_CMD__SD2_CMD   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_DAT0__SD2_DATA0 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_DAT1__SD2_DATA1 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_DAT2__SD2_DATA2 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+	MX6_PAD_SD2_DAT3__SD2_DATA3 | MUX_PAD_CTRL(USDHC_PAD_CTRL),
+};
+
 iomux_v3_cfg_t const usdhc3_pads[] = {
 	MX6_PAD_SD3_CLK__SD3_CLK   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
 	MX6_PAD_SD3_CMD__SD3_CMD   | MUX_PAD_CTRL(USDHC_PAD_CTRL),
@@ -657,6 +666,8 @@ int board_init(void)
 #ifdef CONFIG_MXC_SPI
 	setup_spi();
 #endif
+	imx_iomux_v3_setup_multiple_pads(
+		usdhc2_pads, ARRAY_SIZE(usdhc2_pads));
 	setup_i2c(0, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info0);
 	setup_i2c(1, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info1);
 	setup_i2c(2, CONFIG_SYS_I2C_SPEED, 0x7f, &i2c_pad_info2);