Fixed/reformatted uboot's bootcmd env var (WC)

Beforehand, if the env variable ACTIVATED_KERNEL_NAME was set to
kernel1, then bootargs would be set with "root=31:09" (boot from
partition 9), but if ACTIVATED_KERNEL_NAME was then set back to the
default "kernel0," bootargs would not be set to the previous value
wherein root is set to "31:04" (boot from partition 4).

This also fixes some typos.

Change-Id: I17a28d0cb7936d02efc312a6415f04607bfdd46e
1 file changed