[libcpu] rv64: support for ARCH_REMAP_KERNEL (#9067)

* [libcpu] support for ARCH_REMAP_KERNEL

These changes introduce support for the ARCH_REMAP_KERNEL configuration,
which isolates kernel space in high virtual address regions. This feature
is necessary to enhance memory protection and management by segregating
user and kernel spaces more effectively.

Changes:
- Updated conditional macros to check for ARCH_REMAP_KERNEL instead of
  ARCH_KERNEL_IN_HIGH_VA in board initialization files to reflect the new
  configuration option.
- Modified qemu-virt64-riscv Kconfig and SConstruct files to include and
  utilize ARCH_REMAP_KERNEL.
- Created a new linker script `link_smart.lds` for smart linking in qemu-virt64-riscv.
- Updated rtconfig.py to use a more flexible execution path setup.
- Enhanced user address space definitions in `lwp_arch.h` to support the
  new virtual address mappings.
- Adjusted kernel memory initialization and mapping logic in `c906/mmu.c`
  and `virt64/mmu.c` to account for high virtual address regions.
- Added Kconfig option to enable ARCH_REMAP_KERNEL for RISCV64 architectures.
- Enhanced memory setup functions to support new mapping scheme, including
  updates to early page table setup and address relocation logic.

These modifications ensure that the system can utilize high memory
addresses for the kernel, improving memory isolation and system stability.

Signed-off-by: Shell <smokewood@qq.com>

* fixup: CI run failed

* bsp: default config without using smart

* fixup: static checks

* restore rt_hw_mmu_kernel_map_init for D1

---------

Signed-off-by: Shell <smokewood@qq.com>

src/Kconfig

@@ -36,6 +36,8 @@ config RT_USING_SMART
     select RT_USING_KTIME
     select RT_USING_STDC_ATOMIC
     select RT_USING_SYSTEM_WORKQUEUE
+    select RT_USING_CPU_USAGE_TRACER
+    select RT_USING_SCHED_THREAD_CTX
     depends on ARCH_ARM_CORTEX_M || ARCH_ARM_ARM9 || ARCH_ARM_CORTEX_A || ARCH_ARMV8 || ARCH_RISCV64
     depends on !RT_USING_NANO
     help