move ETMEM feature CONFIG to mm/Kconfig and add architecture dependency

euleros inclusion
category: feature
feature: etmem
bugzilla: 48246

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The original etmem feature failed to compile a specific architecture,
for example, powerpc, because the architecture is not specified.

This patch is move ETMEM feature CONFIG to mm/Kconfig and add
architecture.

Signed-off-by: liubo <liubo254@huawei.com>
Reviewed-by: jingxiangfeng 00447129 <jingxiangfeng@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>