Replace clock hard-coded number with a define from bindings.  No
functional change.
Signed-off-by: NKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: NAlim Akhtar <alim.akhtar@samsung.com>
Link: https://lore.kernel.org/r/20220122131457.63304-1-krzysztof.kozlowski@canonical.com