clk: ti: clkctrl: fix error messages to print out node name properly

Current node name does not convey any information, as it is always "clk".
Instead, print out the full node path, which will tell us better where
something went wrong.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>