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_sockit_defconfig b/configs/socfpga_sockit_defconfig
index 8448913..f421740 100644
--- a/configs/socfpga_sockit_defconfig
+++ b/configs/socfpga_sockit_defconfig
@@ -45,6 +45,7 @@
 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_SPI_FLASH_USE_4K_SECTORS is not set