mshv-bindings: Add new constants for SEV-SNP #118
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Summary of the PR
These constants represents the feature bitmap for the hypervisor supported features.
Currently we only support two features and thus I have added only those two constants.
The feature bitmap is documented in AMD's SEV-SNP GHCB handling manual. https://www.amd.com/content/dam/amd/en/documents/epyc-technical-docs/specifications/56421.pdf Please refer to Table 1 on page 13.
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