arm64: add KVM_REG_ARM64_SVE_VLS const

For using SVE scenario, KVM_REG_ARM64_SVE_VLS is used by
set_one_reg/get_one_reg ioctls, which allows the set of vector lengths
supported by the vcpu to be discovered and configured by userspace. See
https://dri.freedesktop.org/docs/drm/virt/kvm/api.html#kvm-set-one-reg

When using bindgen, this const is missing, so add it according to the
definition in linux.

Signed-off-by: xuejun-xj <[email protected]>

Author: xuejun-xj

src/arm64/bindings.rs

@@ -285,6 +285,7 @@ pub const KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3_NOT_AVAIL: u32 = 0;
 pub const KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3_AVAIL: u32 = 1;
 pub const KVM_REG_ARM_SMCCC_ARCH_WORKAROUND_3_NOT_REQUIRED: u32 = 2;
 pub const KVM_REG_ARM64_SVE: u32 = 1376256;
+pub const KVM_REG_ARM64_SVE_VLS: u64 = KVM_REG_ARM64 | KVM_REG_ARM64_SVE as u64 | KVM_REG_SIZE_U512 | 0xffff;
 pub const KVM_REG_ARM64_SVE_ZREG_BASE: u32 = 0;
 pub const KVM_REG_ARM64_SVE_PREG_BASE: u32 = 1024;
 pub const KVM_REG_ARM64_SVE_FFR_BASE: u32 = 1536;