spi: rpc: Add support for operation without clock framework

Add ifdeffery to allow operation without the clock framework
enabled. This is required on RZ/A1, as it does not have clock
driver yet.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Chris Brandt <chris.brandt@renesas.com>
Cc: Jagan Teki <jagan@amarulasolutions.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 2830f76..dc3e23f 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -173,7 +173,7 @@
 
 config RENESAS_RPC_SPI
 	bool "Renesas RPC SPI driver"
-	depends on RCAR_GEN3
+	depends on RCAR_GEN3 || RZA1
 	imply SPI_FLASH_BAR
 	help
 	  Enable the Renesas RPC SPI driver, used to access SPI NOR flash