spi: Drop spi_controller type

Not needed anymore. Drop it fast before it encourages anyone to
violate layers again!

Change-Id: I8eda93b429e3ebaef79e22aba76be62987e496f4
Signed-off-by: Nico Huber <nico.h@gmx.de>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/33651
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/buspirate_spi.c b/buspirate_spi.c
index 09f10c3..fb066c2 100644
--- a/buspirate_spi.c
+++ b/buspirate_spi.c
@@ -133,7 +133,6 @@
 					 const unsigned char *writearr, unsigned char *readarr);
 
 static struct spi_master spi_master_buspirate = {
-	.type		= SPI_CONTROLLER_BUSPIRATE,
 	.features	= SPI_MASTER_4BA,
 	.max_data_read	= MAX_DATA_UNSPECIFIED,
 	.max_data_write	= MAX_DATA_UNSPECIFIED,
@@ -663,4 +662,4 @@
 	memcpy(readarr, bp_commbuf + 1, readcnt);
 
 	return ret;
-}
\ No newline at end of file
+}