arm: mvebu: turris_omnia: Add Winbond SPI flash support

Some new Omnia boards will come with Winbond SPI flash. Add to
defconfig.

Signed-off-by: Marek BehĂșn <kabel@kernel.org>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/configs/turris_omnia_defconfig b/configs/turris_omnia_defconfig
index ff16825..0bf4b0a 100644
--- a/configs/turris_omnia_defconfig
+++ b/configs/turris_omnia_defconfig
@@ -88,6 +88,7 @@
 CONFIG_SF_DEFAULT_SPEED=40000000
 CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_SPI_FLASH_SPANSION=y
+CONFIG_SPI_FLASH_WINBOND=y
 CONFIG_SPI_FLASH_MTD=y
 CONFIG_PHY_MARVELL=y
 CONFIG_PHY_FIXED=y