ARM: config: enable ARCH_HIX5HD2

Since both ARCH_HI3xxx and ARCH_HIX5HD2 are based on Cortex A9 & they're
using similiar kernel features, make them share the hi3xxx_config.

And add it into multi_v7_defconfig too.
Signed-off-by: Haojian Zhuang <haojian.zhuang@linaro.org>
Acked-by: Wei Xu <xuwei5@hisilicon.com>
[olof: also turn on ARCH_HISI in multi_v7]
Signed-off-by: Olof Johansson <olof@lixom.net>

arch/arm/configs/hi3xxx_defconfig

@@ -3,7 +3,9 @@ CONFIG_NO_HZ=y
 CONFIG_HIGH_RES_TIMERS=y
 CONFIG_BLK_DEV_INITRD=y
 CONFIG_RD_LZMA=y
+CONFIG_ARCH_HISI=y
 CONFIG_ARCH_HI3xxx=y
+CONFIG_ARCH_HIX5HD2=y
 CONFIG_SMP=y
 CONFIG_PREEMPT=y
 CONFIG_AEABI=y

arch/arm/configs/multi_v7_defconfig

@@ -24,7 +24,9 @@ CONFIG_MACH_BERLIN_BG2=y
 CONFIG_MACH_BERLIN_BG2CD=y
 CONFIG_MACH_BERLIN_BG2Q=y
 CONFIG_ARCH_HIGHBANK=y
+CONFIG_ARCH_HISI=y
 CONFIG_ARCH_HI3xxx=y
+CONFIG_ARCH_HIX5HD2=y
 CONFIG_ARCH_KEYSTONE=y
 CONFIG_ARCH_MXC=y
 CONFIG_MACH_IMX51_DT=y