stv0991: enable cadence qspi controller & spi flash

This patch does all the board configurations required to use the qspi
controller & attached spi flash memory.

Signed-off-by: Vikas Manocha <vikas.manocha@st.com>
Reviewed-by: Jagannadh Teki <jteki@openedev.com>

arch/arm/Kconfig

@@ -227,6 +227,9 @@ config TARGET_STV0991
 	select CPU_V7
 	select DM
 	select DM_SERIAL
+	select DM_SPI
+	select DM_SPI_FLASH
+	select SPI_FLASH
 
 config TARGET_X600
 	bool "Support x600"

include/configs/stv0991.h

@@ -75,4 +75,19 @@
 #define CONFIG_BOOTCOMMAND                     "go 0x40040000"
 
 #define CONFIG_OF_LIBFDT
+
+/*
++ * QSPI support
++ */
+#ifdef CONFIG_OF_CONTROL		/* QSPI is controlled via DT */
+#define CONFIG_CADENCE_QSPI
+#define CONFIG_CQSPI_DECODER		0
+#define CONFIG_CQSPI_REF_CLK		((30/4)/2)*1000*1000
+#define CONFIG_CMD_SPI
+
+#define CONFIG_SPI_FLASH_STMICRO	/* Micron/Numonyx flash */
+#define CONFIG_SPI_FLASH_WINBOND	/* WINBOND */
+#define CONFIG_CMD_SF
+#endif
+
 #endif /* __CONFIG_H */