stm32mp1: Increase ENV_SIZE

Increase ENV_SIZE from 4 to 8 Ko

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index 77f66c6..a8b09fb 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -29,7 +29,7 @@
 	default 0x2000000
 
 config ENV_SIZE
-	default 0x1000
+	default 0x2000
 
 config TARGET_STM32MP1
 	bool "Support stm32mp1xx"