nvidia/tegra132: Add spi_crop_chunk()

Missed during upstreaming

Change-Id: Ifef4bb8a097a71244bdb648840cd64a812673107
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/9950
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>

src/soc/nvidia/tegra132/spi.c

@@ -731,6 +731,11 @@ static int xfer_finish(struct tegra_spi_channel *spi)
 	return ret;
 }
 
+unsigned int spi_crop_chunk(unsigned int cmd_len, unsigned int buf_len)
+{
+	return buf_len;
+}
+
 int spi_xfer(struct spi_slave *slave, const void *dout,
 		unsigned int out_bytes, void *din, unsigned int in_bytes)
 {