clk: Add directory for STM32 clock drivers

Add a directory in drivers/clk to regroup the clock drivers for all
STM32 Soc with CONFIG_ARCH_STM32 (MCUs with cortex M) or
CONFIG_ARCH_STM32MP (MPUs with cortex A).

Signed-off-by: Patrick Delaunay <patrick.delaunay@foss.st.com>
Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Grzegorz Szymaszek <gszymaszek@short.pl>
Acked-by: Sean Anderson <seanga2@gmail.com>
Change-Id: I955af307963f732167396f0157a30cf2fc91f150
diff --git a/drivers/clk/stm32/Kconfig b/drivers/clk/stm32/Kconfig
new file mode 100644
index 0000000..eac3fc1
--- /dev/null
+++ b/drivers/clk/stm32/Kconfig
@@ -0,0 +1,23 @@
+config CLK_STM32F
+	bool "Enable clock driver support for STM32F family"
+	depends on CLK && (STM32F7 || STM32F4)
+	default y
+	help
+	  This clock driver adds support for RCC clock management
+	  for STM32F4 and STM32F7 SoCs.
+
+config CLK_STM32H7
+	bool "Enable clock driver support for STM32H7 family"
+	depends on CLK && STM32H7
+	default y
+	help
+	  This clock driver adds support for RCC clock management
+	  for STM32H7 SoCs.
+
+config CLK_STM32MP1
+	bool "Enable RCC clock driver for STM32MP15"
+	depends on ARCH_STM32MP && CLK
+	default y if STM32MP15x
+	help
+	  Enable the STM32 clock (RCC) driver. Enable support for
+	  manipulating STM32MP15's on-SoC clocks.