dm: sf: Add support for all targets which requires MANUAL_RELOC

It is follow up patch based on
"dm: Add support for all targets which requires MANUAL_RELOC"
(sha1: 484fdf5ba058b07be5ca82763aa2b72063540ef3)
to update function pointers for DM.

Using post_bind is not ideal but it is one on current option what can be
used. Variable reloc_done has to be used do not call relocation after
every bind. Maybe new core functions should be introduced for this case.

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

drivers/mtd/spi/sf-uclass.c

@@ -11,6 +11,8 @@
 #include <dm/device-internal.h>
 #include "sf_internal.h"
 
+DECLARE_GLOBAL_DATA_PTR;
+
 int spi_flash_read_dm(struct udevice *dev, u32 offset, size_t len, void *buf)
 {
 	return sf_get_ops(dev)->read(dev, offset, len, buf);
@@ -72,8 +74,29 @@ int spi_flash_remove(struct udevice *dev)
 	return device_remove(dev);
 }
 
+static int spi_flash_post_bind(struct udevice *dev)
+{
+#if defined(CONFIG_NEEDS_MANUAL_RELOC)
+	struct dm_spi_flash_ops *ops = sf_get_ops(dev);
+	static int reloc_done;
+
+	if (!reloc_done) {
+		if (ops->read)
+			ops->read += gd->reloc_off;
+		if (ops->write)
+			ops->write += gd->reloc_off;
+		if (ops->erase)
+			ops->erase += gd->reloc_off;
+
+		reloc_done++;
+	}
+#endif
+	return 0;
+}
+
 UCLASS_DRIVER(spi_flash) = {
 	.id		= UCLASS_SPI_FLASH,
 	.name		= "spi_flash",
+	.post_bind	= spi_flash_post_bind,
 	.per_device_auto_alloc_size = sizeof(struct spi_flash),
 };