[PATCH V2] cmd: mem: fix to display wrong memory information

[Jaehoon Chung]

When run meminfo command, it's displayed wrong memory information.
Because some boards are that gd->ram_size is reassigned to other value
in board file.
Additionally, display a memory bank information.

On 4G RPI4 target
- Before
   U-Boot> meminfo
   DRAM: 948MiB
- After
   U-Boot> meminfo
   Bank #0: 0 948 MiB
   Bank #1: 40000000 2.9 GiB
   Bank #2: 0 0 Bytes
   Bank #3: 0 0 Bytes
   DRAM: 3.9GiB

Signed-off-by: Jaehoon Chung <jh80.chung at samsung.com>
---
Changes in v2:
- Change patch subject prefix from "common: board_f" to "cmd: mem"
- Update commit-msg
- Revert common/board_f.c modification. Instead, add codes in mem.c
---
 cmd/mem.c | 16 +++++++++++++++-
 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/cmd/mem.c b/cmd/mem.c
index 1d4f2bab2f9a..86f48a6e121a 100644
--- a/cmd/mem.c
+++ b/cmd/mem.c
@@ -1387,8 +1387,22 @@ U_BOOT_CMD(
 static int do_mem_info(struct cmd_tbl *cmdtp, int flag, int argc,
 		       char *const argv[])
 {
+	unsigned long long size;
+
+#ifdef CONFIG_NR_DRAM_BANKS
+	int i;
+
+	for (i = size = 0; i < CONFIG_NR_DRAM_BANKS; i++) {
+		size += gd->bd->bi_dram[i].size;
+		printf("Bank #%d: %llx ", i,
+		      (unsigned long long)(gd->bd->bi_dram[i].start));
+			print_size(gd->bd->bi_dram[i].size, "\n");
+	}
+#else
+	size = gd->ram_size;
+#endif
 	puts("DRAM:  ");
-	print_size(gd->ram_size, "\n");
+	print_size(size, "\n");
 
 	return 0;
 }
-- 
2.29.0