ARM: LPC32xx: add PL175 memory controller driver to defconfig

The change enables build of ARM PrimeCell PL17x driver for LPC32xx
platform, the memory controller is commonly used to interface NOR
flash drives.
Signed-off-by: Vladimir Zapolskiy <vz@mleia.com>

arch/arm/configs/lpc32xx_defconfig

@@ -170,6 +170,8 @@ CONFIG_DMADEVICES=y
 CONFIG_AMBA_PL08X=y
 CONFIG_STAGING=y
 CONFIG_LPC32XX_ADC=y
+CONFIG_MEMORY=y
+CONFIG_ARM_PL172_MPMC=y
 CONFIG_IIO=y
 CONFIG_MAX517=y
 CONFIG_PWM=y