dm: spi: Add logging of some return values

When SPI flash operations fail it is helpful to be able to see the error
codes and where they are generated. Add logging to capture this
information for read operations.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/drivers/mtd/spi/sf-uclass.c b/drivers/mtd/spi/sf-uclass.c
index 3858f77..662525f 100644
--- a/drivers/mtd/spi/sf-uclass.c
+++ b/drivers/mtd/spi/sf-uclass.c
@@ -14,18 +14,18 @@
 
 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);
+	return log_ret(sf_get_ops(dev)->read(dev, offset, len, buf));
 }
 
 int spi_flash_write_dm(struct udevice *dev, u32 offset, size_t len,
 		       const void *buf)
 {
-	return sf_get_ops(dev)->write(dev, offset, len, buf);
+	return log_ret(sf_get_ops(dev)->write(dev, offset, len, buf));
 }
 
 int spi_flash_erase_dm(struct udevice *dev, u32 offset, size_t len)
 {
-	return sf_get_ops(dev)->erase(dev, offset, len);
+	return log_ret(sf_get_ops(dev)->erase(dev, offset, len));
 }
 
 /*