clk: samsung: describe drivers in Kconfig

Describe better which driver applies to which SoC, to make configuring
kernel for Samsung SoC easier.

Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Link: https://lore.kernel.org/r/20210924133624.112593-1-krzysztof.kozlowski@canonical.com


Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>