nvmem: dt-bindings: Fix the error of dt-bindings check

1. Remove the unnecessary header file for dt-binding check
2. Replace OTPRX with 0x15 since it is not defined here.
3. Modify the name of the node of the clock driver.

Fixes: 8fb29b45

 ("dt-bindings: nvmem: Add bindings doc for Sunplus OCOTP driver")
Reported-by: Rob Herring <robh+dt@kernel.org>
Signed-off-by: Vincent Shih <vincent.sunplus@gmail.com>
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Link: https://lore.kernel.org/r/20220225175822.8293-2-srinivas.kandagatla@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>