Fix: Disable KleidiAI on systems with SME1 but not SME2 #26399
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This PR fixes an issue where KleidiAI was incorrectly enabled on systems that support SME1 but not SME2, leading to crashes.
The issue was reported in #26377.
The fix involves changing the check in
onnxruntime/core/mlas/lib/platform.cppto useHasArm_SME2()instead ofHasArm_SME(). This ensures that KleidiAI is only enabled on systems that have SME2 support.