spi: Kconfig: Mark SH_SPI as DEPRECATED

Mark SH_SPI as DEPRECATED, this so the resulting build shows
warning for a deprecated configuration enabled and associated code
will remove in v2019.07 release.

Acked-by: Marek Vasut <marex@denx.de>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
[trini: Switch to DEPRECATED]
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 2f494c0..c2e9180 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -354,6 +354,7 @@
 
 config SH_SPI
 	bool "SuperH SPI driver"
+	depends on DEPRECATED
 	help
 	  Enable the SuperH SPI controller driver. This driver can be used
 	  on various SuperH SoCs, such as SH7757.