[U-Boot] [PATCH v3 6/7] x86: acpi: Add SPCR table description

[sjg at google.com]

Add SPCR table description as it provided in Linux kernel.

Port subtype for ACPI_DBG2_SERIAL_PORT is used as an interface type in SPCR.
Thus, provide a set of definitions to be utilized later.

Signed-off-by: Andy Shevchenko <andriy.shevchenko at linux.intel.com>
Reviewed-by: Bin Meng <bmeng.cn at gmail.com>
---
 arch/x86/include/asm/acpi_table.h | 49 +++++++++++++++++++++++++++++++
 1 file changed, 49 insertions(+)

Applied to u-boot-dm/master, thanks!