It maybe due to a copy-paste error the error handing should be
cclk not clk when checking if the cpuclk registration succeeded.
Reported-by: NLin Huang <lin.huang@rock-chips.com>
Signed-off-by: NXing Zheng <zhengxing@rock-chips.com>
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>