clk: samsung: artpec-8: Add initial clock support for ARTPEC-8 SoC

clk: samsung: artpec-8: Add initial clock support for ARTPEC-8 SoC

Add initial clock support for Axis ARTPEC-8 SoC which is required
for enabling basic clock management.

Add clock support for below CMU (Clock Management Unit) blocks
in ARTPEC-8 SoC:
 - CMU_CMU
 - CMU_BUS
 - CMU_CORE
 - CMU_CPUCL
 - CMU_FSYS
 - CMU_IMEM
 - CMU_PERI

Signed-off-by: Hakyeong Kim <hgkim05@coasia.com>
Signed-off-by: Varada Pavani <v.pavani@samsung.com>
Signed-off-by: SeonGu Kang <ksk4725@coasia.com>
Signed-off-by: Ravi Patel <ravi.patel@samsung.com>
Link: https://lore.kernel.org/r/20250825114436.46882-4-ravi.patel@samsung.com
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>