drivers: clock_control: Add stm32u0 clock control support

Reuse the file clock_stm32g0.c for the STM32U0 and
rename it to clock_stm32g0_u0.c
because the G0 and U0 series share the same clock control.

Signed-off-by: IBEN EL HADJ MESSAOUD Marwa <marwa.ibenelhadjmessaoud-ext@st.com>

drivers/clock_control/CMakeLists.txt

@@ -57,12 +57,13 @@ else()
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32F3X clock_stm32f0_f3.c)
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32F4X clock_stm32f2_f4_f7.c)
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32F7X clock_stm32f2_f4_f7.c)
-  zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32G0X clock_stm32g0.c)
+  zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32G0X clock_stm32g0_u0.c)
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32G4X clock_stm32g4.c)
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32L0X clock_stm32l0_l1.c)
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32L1X clock_stm32l0_l1.c)
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32L4X clock_stm32l4_l5_wb_wl.c)
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32L5X clock_stm32l4_l5_wb_wl.c)
+  zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32U0X clock_stm32g0_u0.c)
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32WBX clock_stm32l4_l5_wb_wl.c)
   zephyr_library_sources_ifdef(CONFIG_SOC_SERIES_STM32WLX clock_stm32l4_l5_wb_wl.c)
 endif()