cmd: Add a command to display the address map

This adds a new command 'addrmap' to display the address map for
non-identity virtual-physical memory mappings.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Priyanka Jain <priyanka.jain@nxp.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 4defbd9..fcf59cd 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -97,6 +97,13 @@
 	  between the firmware and OS, and is particularly useful when you
 	  want to make hardware changes without the OS needing to be adjusted.
 
+config CMD_ADDRMAP
+	bool "addrmap"
+	depends on ADDR_MAP
+	default y
+	help
+	  List non-identity virtual-physical memory mappings for 32-bit CPUs.
+
 config CMD_BDI
 	bool "bdinfo"
 	default y