icorem6_rqs: env: Return mmc devno

Instead of changing mmc devno from dts nodes better
to return the detected devno so-that env trigger the same.

Cc: Stefano Babic <sbabic@denx.de>
Cc: Tom Rini <trini@konsulko.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>

board/engicam/icorem6_rqs/icorem6_rqs.c

@@ -27,8 +27,7 @@ DECLARE_GLOBAL_DATA_PTR;
 #ifdef CONFIG_ENV_IS_IN_MMC
 int board_mmc_get_env_dev(int devno)
 {
-	/* dev 0 for SD/eSD, dev 1 for MMC/eMMC */
-	return (devno == 3) ? 1 : 0;
+	return devno;
 }
 #endif