Add RISC-V Zicclsm support to MEM_FORCE_MEMORY_ACCESS

[Polaris-911]

Zicclsm: Main memory supports misaligned loads/stores
According to the RVA20U64 specification, the Zicclsm extension is mandatory and is supported in gcc versions 14.1 and above.
References
GCC Zicclsm
RVA20U64 specification

Performance Test Results: zstd with Different MEM_FORCE_MEMORY_ACCESS Settings

Test Environment

[root@r2044-r1-s1 ~]# dmidecode -t processor | grep "Version"
        Version: SG2044
[root@r2044-r1-s1 ~]# uname -a
Linux r2044-r1-s1 6.12.47-25.09.16.17.riscv64 #1 SMP Tue Sep 16 17:47:24 CST 2025 riscv64 riscv64 riscv64 GNU/Linux

Compressor	Metric	MEM_FORCE_MEMORY_ACCESS=2	MEM_FORCE_MEMORY_ACCESS=1	Improvement Ratio*
zstd 1.5.7 -1	Compression Speed	72.0 MB/s	57.5 MB/s	~25.2%
zstd 1.5.7 -1	Decompression Speed	93.7 MB/s	93.4 MB/s	~0.3%
zstd 1.5.7 -22	Compression Speed	0.24 MB/s	0.22 MB/s	~9.1%
zstd 1.5.7 -22	Decompression Speed	71.0 MB/s	66.8 MB/s	~6.3%

1. MEM_FORCE_MEMORY_ACCESS=1

[root@r2044-r1-s1 lzbench-master]#./lzbench -t0,0 -i5,5 -ezstd,1,22 ../silesia.tar
lzbench 2.1 | GCC 12.3.1 | 64-bit Linux |

Compressor name         Compress. Decompress. Compr. size  Ratio Filename
zstd 1.5.7 -1            57.5 MB/s  93.4 MB/s    73216302  34.54 ../silesia.tar
zstd 1.5.7 -22           0.22 MB/s  66.8 MB/s    52222248  24.64 ../silesia.tar
[Params] cIters=5 dIters=5 cTime=0.0 dTime=0.0 chunkSize=0KB cSpeed=0MB

2. MEM_FORCE_MEMORY_ACCESS=2

[root@r2044-r1-s1 lzbench-master]#./lzbench -t0,0 -i5,5 -ezstd,1,22 ../silesia.tar
lzbench 2.1 | GCC 12.3.1 | 64-bit Linux |

Compressor name         Compress. Decompress. Compr. size  Ratio Filename
zstd 1.5.7 -1            72.0 MB/s  93.7 MB/s    73216302  34.54 ../silesia.tar
zstd 1.5.7 -22           0.24 MB/s  71.0 MB/s    52222248  24.64 ../silesia.tar
[Params] cIters=5 dIters=5 cTime=0.0 dTime=0.0 chunkSize=0KB cSpeed=0MB