target/i386/mshv: use generic FPU/xcr0 state

Instead of using an mshv-specific FPU state representation we switch to
the generic i386 representation of the registers.

Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>
Link: https://lore.kernel.org/r/20260417105618.3621-3-magnuskulke@linux.microsoft.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2 files changed