soc: qcom: eud: Fix inconsistent nature of the cmdline

The EUD driver's 'enable' command line argument is set to
EUD_ENABLE_CMD even if the bootloader hasn't enabled it,
which is not correct. Hence, update the 'enable' variable
based on the state of the hardware.

Change-Id: I1159436c0e9a803462f2154ccc05649d3f7b40da
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>