ANDROID: KVM: arm64: REVERTME: Retain SVE allocation size

commit a592498e ("ANDROID: KVM: arm64: Use hyp_alloc for pVMs sve_state")
Changed allocation of sve state to come from newly pKVM heap allocator
instead of the host which was page aligned, this seems to introduce some
problems, till the sve allocation size is fixed, retain the original
behviour which had no issues.

Bug: 278749606
Change-Id: Ie7b70806f0d3908f06ca6ead61cfc44a99ef646c
Signed-off-by: Mostafa Saleh <smostafa@google.com>