KVM: arm64: Enable stack protection and branch profiling for VHE

For historical reasons, the VHE code inherited the build configuration from
nVHE. Now those two parts have their own folder and makefile, we can
enable stack protection and branch profiling for VHE.

Signed-off-by: Vincent Donnefort <vdonnefort@google.com>
Reviewed-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221004154216.2833636-1-vdonnefort@google.com