drivers: soc: qcom: Enable EUD only after initialization

When EUD is enabled through the command line, since command
line parameters are set early in the boot sequence, it is
possible for the EUD enabling function to be called, before
the necessary data structures are initialized. Allow enabling
function to be called only if EUD has been initialized at the
time the enabling function is invoked.

Change-Id: If8f6c425aad609bd7ea9f1b028f7ee30a060a308
Signed-off-by: Isaac J. Manjarres <isaacm@codeaurora.org>