clk: add driver for stm32mp1

add RCC clock driver for STMP32MP157
- base on driver model = UCLASS_CLK
- support ops to enable, disable and get rate
  of all SOC clock needed by U-Boot

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/drivers/clk/Kconfig b/drivers/clk/Kconfig
index cdfa052..c382e88 100644
--- a/drivers/clk/Kconfig
+++ b/drivers/clk/Kconfig
@@ -75,6 +75,14 @@
 	  This clock driver adds support for clock realted settings for
 	  ZynqMP platform.
 
+config CLK_STM32MP1
+	bool "Enable RCC clock driver for STM32MP1"
+	depends on ARCH_STM32MP && CLK
+	default y
+	help
+	  Enable the STM32 clock (RCC) driver. Enable support for
+	  manipulating STM32MP1's on-SoC clocks.
+
 source "drivers/clk/tegra/Kconfig"
 source "drivers/clk/uniphier/Kconfig"
 source "drivers/clk/exynos/Kconfig"