For a generic environment, we shouldn't have a fixed rootfs filesystem
so we drop it from env.
Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>
        "uimage=uImage\0" \
        "mmcdev=0\0" \
        "mmcpart=2\0" \
-       "mmcroot=/dev/mmcblk0p3 rw\0" \
-       "mmcrootfstype=ext3 rootwait\0" \
-       "mmcargs=setenv bootargs console=ttymxc0,${baudrate} " \
-               "root=${mmcroot} " \
-               "rootfstype=${mmcrootfstype}\0" \
+       "mmcroot=/dev/mmcblk0p3 rw rootwait\0" \
+       "mmcargs=setenv bootargs console=ttymxc0,${baudrate} root=${mmcroot} " \
        "loadbootscript=" \
                "fatload mmc ${mmcdev}:${mmcpart} ${loadaddr} ${script};\0" \
        "bootscript=echo Running bootscript from mmc ...; " \