ARM: mach-shmobile: fix memory size for kota2_defconfig

The CONFIG_MEMORY_SIZE value is interpreted as a 32 bit integer, which
makes sense on a system without PAE. It appears that a trailing 0 was
appended to the value and after some testing it appears that 0x1e000000 is
the correct value.

Without this patch, building kota2_defconfig results in:

/home/arnd/linux-arm/arch/arm/kernel/setup.c:790:2: warning: large integer implicitly truncated to unsigned type [-Woverflow]
Reported-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>

arch/arm/configs/kota2_defconfig

@@ -21,7 +21,7 @@ CONFIG_ARCH_SHMOBILE=y
 CONFIG_KEYBOARD_GPIO_POLLED=y
 CONFIG_ARCH_SH73A0=y
 CONFIG_MACH_KOTA2=y
-CONFIG_MEMORY_SIZE=0x1e0000000
+CONFIG_MEMORY_SIZE=0x1e000000
 # CONFIG_SH_TIMER_TMU is not set
 # CONFIG_SWP_EMULATE is not set
 CONFIG_CPU_BPREDICT_DISABLE=y