stm32mp1: key: add stm32key command

Add dedicated command to register in fuse a public hash
key provided by keygen tool.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
diff --git a/arch/arm/mach-stm32mp/Kconfig b/arch/arm/mach-stm32mp/Kconfig
index 9c5c93c..d13d76e 100644
--- a/arch/arm/mach-stm32mp/Kconfig
+++ b/arch/arm/mach-stm32mp/Kconfig
@@ -90,6 +90,14 @@
 	help
 	  Say y to enable STM32 Extended TrustZone Protection
 
+config CMD_STM32KEY
+	bool "command stm32key to fuse public key hash"
+	default y
+	depends on CMD_FUSE
+	help
+		fuse public key hash in corresponding fuse used to authenticate
+		binary.
+
 config BOOTSTAGE_STASH_ADDR
 	default 0xC3000000