Acrn introduces pci based vuart. Update the existing vuarts and add the
pci based vuart description
1. rename existing vuarts to legacy_vuart
2. add console and communication vuarts general desciption
- the console vuart is similar to legacy_vuart0 but only contains subtag "base"
- the communication vuart is similar to legacy_vuart1 but only contains subtags
"base", "target_vm_id" and "target_uart_id"
Signed-off-by: Yang,Yu-chu <yu-chu.yang@intel.com>
Signed-off-by: David B. Kinder <david.b.kinder@intel.com>
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