Revert "irqchip/gic-v4: Don't allow a VMOVP on a dying VPE"

This reverts commit 64b12b06 which is
commit 1442ee00 upstream.

It breaks the Android kernel abi and can be brought back in the future
in an abi-safe way if it is really needed.

Bug: 161946584
Change-Id: Ia5031b51ea15d52b9b2183de4fa1c9871559bb03
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>