cmd: Update the meminfo command to show the memory map

U-Boot has a fairly rigid memory map which is normally not visible
unless debugging is enabled in board_f.c

Update the 'meminfo' command to show it. This command does not cover
arch-specific pieces but gives a good overview of where things are.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/test/cmd/Makefile b/test/cmd/Makefile
index 4080835..4b487c1 100644
--- a/test/cmd/Makefile
+++ b/test/cmd/Makefile
@@ -19,8 +19,9 @@
 obj-$(CONFIG_CONSOLE_TRUETYPE) += font.o
 obj-$(CONFIG_CMD_HISTORY) += history.o
 obj-$(CONFIG_CMD_LOADM) += loadm.o
-obj-$(CONFIG_CMD_MEM_SEARCH) += mem_search.o
+obj-$(CONFIG_CMD_MEMINFO) += meminfo.o
 obj-$(CONFIG_CMD_MEMORY) += mem_copy.o
+obj-$(CONFIG_CMD_MEM_SEARCH) += mem_search.o
 ifdef CONFIG_CMD_PCI
 obj-$(CONFIG_CMD_PCI_MPS) += pci_mps.o
 endif