bdinfo: nios2: Use the generic bd command

Nios2 currently has some code to output SRAM information which is behind
an #ifdef. No nios2 boards define this option, so the code can be removed.

Move Nios2 over to use the generic function.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/cmd/bdinfo.c b/cmd/bdinfo.c
index 761bcc1..a8f25cc 100644
--- a/cmd/bdinfo.c
+++ b/cmd/bdinfo.c
@@ -222,24 +222,7 @@
 
 #elif defined(CONFIG_NIOS2)
 
-int do_bdinfo(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[])
-{
-	bd_t *bd = gd->bd;
-
-	print_bi_dram(bd);
-	print_bi_flash(bd);
-
-#if defined(CONFIG_SYS_SRAM_BASE)
-	print_num ("sram start",	(ulong)bd->bi_sramstart);
-	print_num ("sram size",		(ulong)bd->bi_sramsize);
-#endif
-
-	print_eth_ip_addr();
-	print_baudrate();
-	print_cpu_word_size();
-
-	return 0;
-}
+#define USE_GENERIC
 
 #elif defined(CONFIG_MICROBLAZE)