riscv: add ACPI fields to global data

Add fields for the location of ACPI tables to the global data.

Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
diff --git a/arch/riscv/include/asm/global_data.h b/arch/riscv/include/asm/global_data.h
index d00247a..593d927 100644
--- a/arch/riscv/include/asm/global_data.h
+++ b/arch/riscv/include/asm/global_data.h
@@ -33,6 +33,12 @@
 	ulong available_harts;
 #endif
 #endif
+#if CONFIG_IS_ENABLED(ACPI)
+	ulong table_start;		/* Start address of ACPI tables */
+	ulong table_end;		/* End address of ACPI tables */
+	ulong table_start_high;		/* Start address of high ACPI tables */
+	ulong table_end_high;		/* End address of high ACPI tables */
+#endif
 #ifdef CONFIG_SMBIOS
 	ulong smbios_start;		/* Start address of SMBIOS table */
 #endif