stm32mp1: ram: add tests in DDR interactive mode

Add command tests for DDR interactive mode, used during
board bring-up or with CubeMX DDR tools to verify the
DDR configuration.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/drivers/ram/stm32mp1/Makefile b/drivers/ram/stm32mp1/Makefile
index 7b1f095..71ded6b 100644
--- a/drivers/ram/stm32mp1/Makefile
+++ b/drivers/ram/stm32mp1/Makefile
@@ -7,6 +7,7 @@
 obj-y += stm32mp1_ddr.o
 
 obj-$(CONFIG_STM32MP1_DDR_INTERACTIVE) += stm32mp1_interactive.o
+obj-$(CONFIG_STM32MP1_DDR_TESTS) += stm32mp1_tests.o
 
 ifneq ($(DDR_INTERACTIVE),)
 CFLAGS_stm32mp1_interactive.o += -DCONFIG_STM32MP1_DDR_INTERACTIVE_FORCE=y