ARM: configs: lpc18xx: enable mma7455 IIO driver

MMA7455 is 3-axis accelerometer that can be found on
Embedded Artists' LPC4357 Developer's Kit.
Signed-off-by: Joachim Eastwood <manabian@gmail.com>

arch/arm/configs/lpc18xx_defconfig

@@ -147,6 +147,9 @@ CONFIG_MEMORY=y
 CONFIG_ARM_PL172_MPMC=y
 CONFIG_PWM=y
 CONFIG_PWM_LPC18XX_SCT=y
+CONFIG_IIO=y
+CONFIG_MMA7455_I2C=y
+CONFIG_IIO_SYSFS_TRIGGER=y
 CONFIG_PHY_LPC18XX_USB_OTG=y
 CONFIG_EXT2_FS=y
 # CONFIG_FILE_LOCKING is not set