ACPI: OSL: Make should_use_kmap() 0 for RISC-V

Without this, if the tables are larger than 4K,
acpi_map() will fail.

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Acked-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Link: https://lore.kernel.org/r/20230515054928.2079268-6-sunilvl@ventanamicro.com


Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>