imx6: icorem6_rqs: Update SPL board boot order for eMMC

SPL mmc device index is get based on the boot device, like
- BOOT_DEVICE_MMC1 for mmc device 0
- BOOT_DEVICE_MMC2 for mmc device 1

Currently BOOT_DEVICE_MMC1 is setting both SD/eSD and MMC/eMMC
boot devices in i.MX, So u-boot is loading from mmc device 0 even
"if the board booting from SD/eSD or MMC/eMMC"

So, this patch set BOOT_DEVICE_MMC2 for MMC/eMMC so for MMC/eMMC
the u-boot is loading from mmc device 1 and the board file need to
take care if the board have different mmc device order intialization.

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

board/engicam/icorem6_rqs/icorem6_rqs.c

@@ -125,6 +125,32 @@ int board_mmc_init(bd_t *bis)
 
 	return 0;
 }
+
+#ifdef CONFIG_ENV_IS_IN_MMC
+void board_boot_order(u32 *spl_boot_list)
+{
+	u32 bmode = imx6_src_get_boot_mode();
+	u8 boot_dev = BOOT_DEVICE_MMC1;
+
+	switch ((bmode & IMX6_BMODE_MASK) >> IMX6_BMODE_SHIFT) {
+	case IMX6_BMODE_SD:
+	case IMX6_BMODE_ESD:
+		/* SD/eSD - BOOT_DEVICE_MMC1 */
+		break;
+	case IMX6_BMODE_MMC:
+	case IMX6_BMODE_EMMC:
+		/* MMC/eMMC */
+		boot_dev = BOOT_DEVICE_MMC2;
+		break;
+	default:
+		/* Default - BOOT_DEVICE_MMC1 */
+		printf("Wrong board boot order\n");
+		break;
+	}
+
+	spl_boot_list[0] = boot_dev;
+}
+#endif
 #endif
 
 /*