mshyperv: fix recognition of Hyper-V guest crash MSR's

mshyperv: fix recognition of Hyper-V guest crash MSR's

Hypervisor Top Level Functional Specification v3.1/4.0 notes that cpuid
(0x40000003) EDX's 10th bit should be used to check that Hyper-V guest
crash MSR's functionality available.

This patch should fix this recognition. Currently the code checks EAX
register instead of EDX.

Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Signed-off-by: Denis V. Lunev <den@openvz.org>
Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
(cherry picked from commit cc2dd4027a43bb36c846f195a764edabc0828602)

Orabug: 21886720
Signed-off-by: Jason Luo <zhangqing.luo@oracle.com>