arm64/mpam: Split header files into suitable location

hulk inclusion
category: feature
feature: ARM MPAM support
bugzilla: 48265
CVE: NA

--------------------------------

So far there are some declarations shared by resctrlfs.c and mpam
core module files under kernel/mpam directory scattered in mpam.h
and resctrl.h, this is organized like this:

-- asm/
   +-- resctrl.h        +
   +-- mpam.h           |    +
   +-- mpam_resource.h  |    |    +
                        |    |    |
-- fs/                  |    |    +-> mpam/
   +-- resctrlfs.c <----+----+------> +-- mpam_resctrl.c ...

We move this declarations shared by resctrlfs.c and mpam/ to resctrl.h
and split another declarations into mpam_internal.h, also including
moving mpam_resource.h to mpam/ directory, currently this is organized
like this:

-- asm/
   +-- mpam.h           +----> export to other modules(e.g. SMMU master io)
   +-- resctrl.h        +
                        |
-- mpam/                |
   +-- mpam_internal.h  |    +
   +-- mpam_resource.h  |    |    +
                        |    |    |
-- fs/                  |    +----+-> mpam/
   +-- resctrlfs.c <----+-----------> +-- mpam_resctrl.c ...

In this way can we build a clearer framework for MPAM usage.

Signed-off-by: Wang ShaoBo <bobo.shaobowang@huawei.com>
Reviewed-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: Cheng Jian <cj.chengjian@huawei.com>
Signed-off-by: Yang Yingliang <yangyingliang@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>