x86/tdx: Fix early #VE handling

tdx_early_handle_ve() does not increment RIP after successfully
handling the exception.  That leads to infinite loop of exceptions.

Move RIP when exceptions are successfully handled.

[ dhansen: make problem statement more clear ]

Fixes: 32e72854

 ("x86/tdx: Port I/O: Add early boot support")
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Link: https://lkml.kernel.org/r/20220614120135.14812-2-kirill.shutemov@linux.intel.com