Introduce generic pre-relocation board_f.c

This file handles common pre-relocation init for boards which use
the generic framework.

It starts up the console, DRAM, performs relocation and then jumps
to post-relocation init.

Signed-off-by: Simon Glass <sjg@chromium.org>
Tested-by: Wolfgang Denk <wd@denx.de>
Acked-by: Wolfgang Denk <wd@denx.de>
diff --git a/include/asm-generic/global_data.h b/include/asm-generic/global_data.h
index b8ac024..ebfe2a3 100644
--- a/include/asm-generic/global_data.h
+++ b/include/asm-generic/global_data.h
@@ -81,6 +81,8 @@
 	unsigned long reloc_off;
 	struct global_data *new_gd;	/* relocated global data */
 	const void *fdt_blob;	/* Our device tree, NULL if none */
+	void *new_fdt;		/* Relocated FDT */
+	unsigned long fdt_size;	/* Space reserved for relocated FDT */
 	void **jt;		/* jump table */
 	char env_buf[32];	/* buffer for getenv() before reloc. */
 	struct arch_global_data arch;	/* architecture-specific data */