misc: stm32: Add STM32MP1 support

Following next kernel rcc bindings, we must use a MFD
RCC driver which is able to bind both clock and reset
drivers.

We can reuse and adapt RCC MFD driver already available
for MCU SoCs (F4/F7/H7).

Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/include/stm32_rcc.h b/include/stm32_rcc.h
index 71da3c1..a09a09f 100644
--- a/include/stm32_rcc.h
+++ b/include/stm32_rcc.h
@@ -43,6 +43,7 @@
 	STM32F42X,
 	STM32F469,
 	STM32F7,
+	STM32MP1,
 };
 
 enum apb {