x86/VT-x: align segment table columns when dumping a VMCS

x86/VT-x: align segment table columns when dumping a VMCS

This makes it more succinct and easier to read.

Before:
  (XEN) Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000
  (XEN) CS: sel=0x0008, attr=0x0c09b, limit=0xffffffff, base=0x0000000000000000
  (XEN) DS: sel=0x0010, attr=0x0c093, limit=0xffffffff, base=0x0000000000000000
  (XEN) SS: sel=0x0010, attr=0x0c093, limit=0xffffffff, base=0x0000000000000000
  (XEN) ES: sel=0x0010, attr=0x0c093, limit=0xffffffff, base=0x0000000000000000
  (XEN) FS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000
  (XEN) GS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000
  (XEN) GDTR:                           limit=0x00000017, base=0x0000000000102eb8
  (XEN) LDTR: sel=0x0000, attr=0x00082, limit=0x0000ffff, base=0x0000000000000000
  (XEN) IDTR:                           limit=0x0000ffff, base=0x0000000000000000
  (XEN) TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000
  (XEN) EFER = 0x0000000000000000  PAT = 0x0007040600070406

After:
  (XEN) Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000
  (XEN)        sel  attr  limit   base
  (XEN)   CS: 0008 0c09b ffffffff 0000000000000000
  (XEN)   DS: 0010 0c093 ffffffff 0000000000000000
  (XEN)   SS: 0010 0c093 ffffffff 0000000000000000
  (XEN)   ES: 0010 0c093 ffffffff 0000000000000000
  (XEN)   FS: 0000 00093 0000ffff 0000000000000000
  (XEN)   GS: 0000 00093 0000ffff 0000000000000000
  (XEN) GDTR:            00000017 0000000000102eb8
  (XEN) LDTR: 0000 00082 0000ffff 0000000000000000
  (XEN) IDTR:            0000ffff 0000000000000000
  (XEN)   TR: 0000 0008b 0000ffff 0000000000000000
  (XEN) EFER = 0x0000000000000000  PAT = 0x0007040600070406

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Kevin Tian <kevin.tian@intel.com>