fix(CSR): fix reset value of mstatus.mdt & mnstatus.nmie (#1076)

[wissygh]

No description provided.

[github-actions]

NEMU Performance Results - XS Interpreter

Test	Guest Instructions	Host Instructions	Estimated Host Throughput (instr/s)	Actual NEMU Throughput (instr/s)	Baseline Host Instructions	Baseline Actual NEMU Throughput (instr/s)	Change vs Baseline (Instructions)
bitmanip.bin	1.385e+05	5.749e+07	2.409e+07	2.365e+07	5.747e+07	2.366e+07	-0.03%
coremark-riscv64-xs-rv64gc-o2.bin	3.354e+06	1.947e+08	1.723e+08	1.641e+08	1.946e+08	1.534e+08	-0.01%
coremark-riscv64-xs-rv64gc-o3.bin	3.394e+06	1.940e+08	1.750e+08	1.283e+08	1.940e+08	1.585e+08	-0.01%
coremark-riscv64-xs-rv64gcb-o3.bin	3.035e+06	1.911e+08	1.588e+08	1.045e+08	1.911e+08	1.403e+08	-0.01%
amtest-riscv64-xs.bin	1.588e+04	8.844e+06	1.795e+07	1.557e+07	8.832e+06	1.657e+07	-0.14%
aliastest-riscv64-xs.bin	1.382e+03	7.745e+06	1.784e+06	2.715e+06	7.732e+06	2.940e+06	-0.17%
softprefetchtest-riscv64-xs.bin	2.649e+03	7.798e+06	3.397e+06	5.953e+06	7.786e+06	9.339e+06	-0.16%
zacas-riscv64-xs.bin	6.471e+04	1.268e+07	5.105e+07	1.579e+07	1.266e+07	2.004e+07	-0.12%
rvv-workload-suite	4.570e+04	1.113e+08	4.106e+06	5.347e+06	1.112e+08	5.074e+06	-0.10%
linux-hello	6.676e+07	1.688e+10	3.955e+07	4.787e+07	1.690e+10	4.764e+07	+0.11%

NEMU Performance Results - XS Ref Shared Object

Test	Guest Instructions	Host Instructions	Estimated Host Throughput (instr/s)	Actual NEMU Throughput (instr/s)	Baseline Host Instructions	Baseline Actual NEMU Throughput (instr/s)	Change vs Baseline (Instructions)
bitmanip.bin	1.385e+05	1.097e+09	1.262e+06	1.031e+06	1.097e+09	1.031e+06	-0.00%
coremark-riscv64-xs-rv64gc-o2.bin	3.354e+06	6.447e+09	5.203e+06	4.507e+06	6.447e+09	4.573e+06	-0.00%
coremark-riscv64-xs-rv64gc-o3.bin	3.394e+06	6.475e+09	5.242e+06	4.693e+06	6.475e+09	4.725e+06	-0.00%
coremark-riscv64-xs-rv64gcb-o3.bin	3.035e+06	6.090e+09	4.983e+06	4.491e+06	6.090e+09	4.206e+06	-0.00%
amtest-riscv64-xs.bin	1.588e+04	3.467e+07	4.580e+06	1.975e+06	3.464e+07	1.924e+06	-0.09%
aliastest-riscv64-xs.bin	1.382e+03	4.906e+06	2.817e+06	7.202e+05	4.877e+06	7.925e+05	-0.60%
softprefetchtest-riscv64-xs.bin	2.649e+03	7.017e+06	3.775e+06	1.252e+06	6.987e+06	1.308e+06	-0.43%
zacas-riscv64-xs.bin	6.471e+04	1.300e+08	4.978e+06	2.076e+06	1.300e+08	2.095e+06	-0.02%
rvv-workload-suite	4.570e+04	4.313e+08	1.060e+06	5.796e+05	4.311e+08	6.424e+05	-0.06%
linux-hello	7.528e+07	6.685e+11	1.126e+06	1.104e+06	6.683e+11	1.131e+06	-0.03%

• Host Instructions is measured by DynamoRIO's inscount client.
• Estimated Host Throughput assumes a fixed 4GHz CPU and IPC=2.5.
• Actual NEMU Throughput is a single native NEMU run and may vary with host CPU performance.
• Baseline columns are populated on pull_request runs when the PR base contains the same defconfig.
• Change vs Baseline (Instructions) is computed from host instruction count; positive means fewer host instructions than baseline.