MAINTAINERS: add tools/spi/ to the SPI entry

Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Mark Brown <broonie@kernel.org>

MAINTAINERS

@@ -11083,6 +11083,7 @@ F:	Documentation/spi/
 F:	drivers/spi/
 F:	include/linux/spi/
 F:	include/uapi/linux/spi/
+F:	tools/spi/
 
 SPIDERNET NETWORK DRIVER for CELL
 M:	Ishizaki Kou <kou.ishizaki@toshiba.co.jp>