Revert "lib: fdt: Split fdtdec_setup_memory_banksize()"

This reverts commit 118f4d4559a4386fa87a1e2509e84a1986b24a34.

There is no user of this split function that's why remove it.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 934944d..36c1ad4 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -1065,33 +1065,33 @@
 static int get_next_memory_node(const void *blob, int mem)
 {
 	do {
-		mem = fdt_node_offset_by_prop_value(blob, mem,
+		mem = fdt_node_offset_by_prop_value(gd->fdt_blob, mem,
 						    "device_type", "memory", 7);
 	} while (!fdtdec_get_is_enabled(blob, mem));
 
 	return mem;
 }
 
-int fdtdec_setup_memory_banksize_fdt(const void *blob)
+int fdtdec_setup_memory_banksize(void)
 {
 	int bank, ret, mem, reg = 0;
 	struct fdt_resource res;
 
-	mem = get_next_memory_node(blob, -1);
+	mem = get_next_memory_node(gd->fdt_blob, -1);
 	if (mem < 0) {
 		debug("%s: Missing /memory node\n", __func__);
 		return -EINVAL;
 	}
 
 	for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {
-		ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
+		ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
 		if (ret == -FDT_ERR_NOTFOUND) {
 			reg = 0;
-			mem = get_next_memory_node(blob, mem);
+			mem = get_next_memory_node(gd->fdt_blob, mem);
 			if (mem == -FDT_ERR_NOTFOUND)
 				break;
 
-			ret = fdt_get_resource(blob, mem, "reg", reg++, &res);
+			ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
 			if (ret == -FDT_ERR_NOTFOUND)
 				break;
 		}
@@ -1111,12 +1111,6 @@
 
 	return 0;
 }
-
-int fdtdec_setup_memory_banksize(void)
-{
-	return fdtdec_setup_memory_banksize_fdt(gd->fdt_blob);
-
-}
 #endif
 
 #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)