feat(st-ddr): add STM32MP2 driver

Add driver to support DDR on STM32MP2 platform. It drives the DDR PHY
and its firmware, as well as the DDR controller.

Signed-off-by: Nicolas Le Bayon <nicolas.le.bayon@st.com>
Signed-off-by: Maxime Méré <maxime.mere@foss.st.com>
Change-Id: I93de2db1b9378d5654e76b3bf6f3407d80bc4ca5
diff --git a/include/drivers/st/stm32mp_ddr.h b/include/drivers/st/stm32mp_ddr.h
index a02ba72..57b0668 100644
--- a/include/drivers/st/stm32mp_ddr.h
+++ b/include/drivers/st/stm32mp_ddr.h
@@ -28,6 +28,9 @@
 struct stm32mp_ddr_reg_desc {
 	uint16_t offset;	/* Offset for base address */
 	uint8_t par_offset;	/* Offset for parameter array */
+#if !STM32MP13 && !STM32MP15
+	bool qd; /* quasi-dynamic register if true */
+#endif
 };
 
 struct stm32mp_ddr_reg_info {