Reland "x86: Move FACP table into separate functions""

Reland "x86: Move FACP table into separate functions""

Each board has its own way of creating this table. Rather than calling the
acpi_create_fadt() function for each one from a common acpi_write_fadt()
function, just move the writer into the board-specific code.

Co-developed-by: Andy Shevchenko <[email protected]>
Signed-off-by: Andy Shevchenko <[email protected]>
Signed-off-by: Simon Glass <[email protected]>
Tested-by: Andy Shevchenko <[email protected]>