CONFIG_SUN4I_TIMER is not available for thedefaultarchitecture x86.
Result is shown for architecture arm

CONFIG_SUN4I_TIMER (not configurable)

modulename: sun4i_timer.ko

configname: CONFIG_SUN4I_TIMER

Linux Kernel Configuration
└─>Device Drivers
└─>SUN4I_TIMER
In linux kernel since version 3.1 (release Date: 2011-10-24)  
source code:
drivers/clocksource/sun4i_timer.c

depends
 or CONFIG_GENERIC_CLOCKEVENTS |
| CONFIG_HAS_IOMEM or  NOT CONFIG_ARCH_USES_GETTIMEOFFSET

is depended by
CONFIG_ARCH_SUNXI