OMAP4: clockdomain: Remove pr_errs' stating unsupported wkdep

Now that wkup and sleep dependencies are supported (in the
form of static deps) for OMAP4, remove all instances of
pr_errs' stating dependencies are still unsupported
on OMAP4.

Signed-off-by: Rajendra Nayak <rnayak@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>