spi: cv1800b: Add spi nor flash controller driver for cv1800b SoC

Add spi nor flash controller driver for cv1800b SoC

Signed-off-by: Kongyang Liu <seashell11234455@gmail.com>
Reviewed-by: Leo Yu-Chi Liang <ycliang@andestech.com>
diff --git a/drivers/spi/Kconfig b/drivers/spi/Kconfig
index 6124346..35030ab 100644
--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -168,6 +168,14 @@
           Enable the ColdFire SPI driver. This driver can be used on
           some m68k SoCs.
 
+config CV1800B_SPIF
+	bool "Sophgo cv1800b SPI Flash Controller driver"
+	depends on SPI_MEM
+	help
+	  Enable the Sophgo cv1800b SPI Flash Controller driver. This driver
+	  can be used to access the SPI NOR flash on platforms embedding this
+	  Sophgo cv1800b IP core.
+
 config DAVINCI_SPI
 	bool "Davinci & Keystone SPI driver"
 	depends on ARCH_DAVINCI || ARCH_KEYSTONE