da850: add support for Spectrum Digital AM18xx EVM

The AM18xx EVM contains winbond SPI flash instead of ST SPI flash in
comparison with logic PD da850/omap-l138 EVM. So enable configuration
to look for winbond flash.

Signed-off-by: Manjunathappa, Prakash <prakash.pm@ti.com>
Signed-off-by: Nagabhushana Netagunte <nagabhushana.netagunte@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
diff --git a/include/configs/da850evm.h b/include/configs/da850evm.h
index 9c92489..f6068a2 100644
--- a/include/configs/da850evm.h
+++ b/include/configs/da850evm.h
@@ -79,6 +79,7 @@
 #define CONFIG_SPI
 #define CONFIG_SPI_FLASH
 #define CONFIG_SPI_FLASH_STMICRO
+#define CONFIG_SPI_FLASH_WINBOND
 #define CONFIG_DAVINCI_SPI
 #define CONFIG_SYS_SPI_BASE		DAVINCI_SPI1_BASE
 #define CONFIG_SYS_SPI_CLK		clk_get(DAVINCI_SPI1_CLKID)