clk: kona-setup: Delete error messages for failed memory allocations

Omit extra messages for a memory allocation failure in this
function.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Acked-by: Scott Branden <scott.branden@broadcom.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>