!3525 ARM: support kaslr feature in arm32 platform

Merge Pull Request from: @foyjog2 
 
support kaslr feature in arm32 platform, using CONFIG_RANDOMIZE_BASE=y to
enable this feature.

Issue
https://gitee.com/openeuler/kernel/issues/I8KNA9

Config Change
Add:
CONFIG_RANDOMIZE_BASE
CONFIG_RELOCATABLE 
 
Link:https://gitee.com/openeuler/kernel/pulls/3525

 

Reviewed-by: Lu Jialin <lujialin4@huawei.com>
Reviewed-by: Zhang Jianhua <chris.zjh@huawei.com>
Reviewed-by: Zucheng Zheng <zhengzucheng@huawei.com>
Reviewed-by: Zheng Zengkai <zhengzengkai@huawei.com>
Reviewed-by: Liu Chao <liuchao173@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>