MIPS: Provide dummy acpi_table.h

Some drivers need this header.
Provide this dummy header as riscv did.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>

arch/mips/include/asm/acpi_table.h

@@ -0,0 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#ifndef __ASM_ACPI_TABLE_H__
+#define __ASM_ACPI_TABLE_H__
+
+/*
+ * This file is needed by some drivers.
+ */
+
+#endif /* __ASM_ACPI_TABLE_H__ */