greybus: endo: Create modules after validating Endo ID

We already have code to parse Endo ID, lets use it to create modules at
run time instead of creating them from a static array.

Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>