arm: socfpga: cyclone5: Enable Macronix flash support

Enable Macronix flash support for Cyclone5 SoC

Signed-off-by: Chin Liang See <chin.liang.see@intel.com>
diff --git a/configs/socfpga_socrates_defconfig b/configs/socfpga_socrates_defconfig
index f49ee96..3873c2b 100644
--- a/configs/socfpga_socrates_defconfig
+++ b/configs/socfpga_socrates_defconfig
@@ -46,6 +46,7 @@
 CONFIG_MMC_DW=y
 CONFIG_SPI_FLASH=y
 CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_SPI_FLASH_SPANSION=y
 CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_PHY_MICREL=y