boards/km_arm: enable support for Macronix SPI NOR flash

The M25P80 and M25P32 SPI flashes from Numonix/Micron
will be replaced by Marconix MX25L80 and MX25L32 flashes.

Signed-off-by: Holger Brunck <holger.brunck@ch.abb.com>
CC: Stefan Roese <sr@denx.de>
CC: Valentin Longchamp <valentin.longchamp@ch.abb.com>
Reviewed-by: Stefan Roese <sr@denx.de>
diff --git a/configs/km_kirkwood_128m16_defconfig b/configs/km_kirkwood_128m16_defconfig
index 10fe7b9..6d0fc42 100644
--- a/configs/km_kirkwood_128m16_defconfig
+++ b/configs/km_kirkwood_128m16_defconfig
@@ -44,6 +44,7 @@
 CONFIG_MTD_RAW_NAND=y
 CONFIG_SF_DEFAULT_SPEED=8100000
 CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_MVGBE=y
 CONFIG_MII=y
 CONFIG_SYS_NS16550=y