plat/common/acpi: Generalize `ACPI` initialization code

plat/common/acpi: Generalize `ACPI` initialization code

Write the code in such a manner that the same set of functions can
accommodate any version of ACPI. Thus, remove `acpi10_*` functions
and define an ACPI table generic fetching function `acpi_get_table`.

Signed-off-by: Sergiu Moga <sergiu.moga@protonmail.com>
Reviewed-by: Dragos Petre <dragos.petre27@gmail.com>
Reviewed-by: Marco Schlumpp <marco@unikraft.io>
Approved-by: Razvan Deaconescu <razvand@unikraft.io>
Tested-by: Unikraft CI <monkey@unikraft.io>
GitHub-Closes: #911