nvme: Add show routine to print detailed information

This adds nvme_print_info() to show detailed NVMe controller and
namespace information.

Signed-off-by: Zhikang Zhang <zhikang.zhang@nxp.com>
Signed-off-by: Wenbin Song <wenbin.song@nxp.com>
Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/nvme/Makefile b/drivers/nvme/Makefile
index 7bd9fa4..1f3010a 100644
--- a/drivers/nvme/Makefile
+++ b/drivers/nvme/Makefile
@@ -4,4 +4,4 @@
 # SPDX-License-Identifier:	GPL-2.0+
 #
 
-obj-y += nvme-uclass.o nvme.o
+obj-y += nvme-uclass.o nvme.o nvme_show.o