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VMware hypercalls use I/O port, VMCALL or VMMCALL instructions.  Add a call to
__tdx_hypercall() in order to support TDX guests.

No change in high bandwidth hypercalls, as only low bandwidth ones are supported
for TDX guests.

  [ bp: Massage, clear on-stack struct tdx_module_args variable. ]
Co-developed-by: Tim Merrifield <tim.merrifield@broadcom.com>
Signed-off-by: Tim Merrifield <tim.merrifield@broadcom.com>
Signed-off-by: Alexey Makhalov <alexey.makhalov@broadcom.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20240613191650.9913-9-alexey.makhalov@broadcom.com