RISC-V: Select ACPI PPTT drivers

After adding ACPI support to populate_cache_leaves(), RISC-V can build
cacheinfo through the ACPI PPTT table, thus enabling the ACPI_PPTT
configuration.
Signed-off-by: Yunhui Cui <cuiyunhui@bytedance.com>
Reviewed-by: Jeremy Linton <jeremy.linton@arm.com>
Reviewed-by: Sudeep Holla <sudeep.holla@arm.com>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
Link: https://lore.kernel.org/r/20240617131425.7526-3-cuiyunhui@bytedance.comSigned-off-by: Palmer Dabbelt <palmer@rivosinc.com>

arch/riscv/Kconfig

@@ -13,6 +13,7 @@ config 32BIT
 config RISCV
 	def_bool y
 	select ACPI_GENERIC_GSI if ACPI
+	select ACPI_PPTT if ACPI
 	select ACPI_REDUCED_HARDWARE_ONLY if ACPI
 	select ARCH_DMA_DEFAULT_COHERENT
 	select ARCH_ENABLE_HUGEPAGE_MIGRATION if HUGETLB_PAGE && MIGRATION