ARM: dts: stm32: Define FMC2 base address

Define FMC2 base address, for use in board files, until there is an
actual FMC2 bus driver.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Patrick Delaunay <patrick.delaunay@st.com>
Cc: Patrice Chotard <patrice.chotard@st.com>
Reviewed-by: NPatrice Chotard <patrice.chotard@st.com>
Reviewed-by: NPatrick Delaunay <patrick.delaunay@st.com>

arch/arm/mach-stm32mp/include/mach/stm32.h

@@ -13,6 +13,7 @@
 #define STM32_RCC_BASE			0x50000000
 #define STM32_PWR_BASE			0x50001000
 #define STM32_DBGMCU_BASE		0x50081000
+#define STM32_FMC2_BASE			0x58002000
 #define STM32_TZC_BASE			0x5C006000
 #define STM32_ETZPC_BASE		0x5C007000
 #define STM32_STGEN_BASE		0x5C008000