Compile some MIPS devices only once

Move CPU specific declarations to a separate file.

Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

hw/mips_cpudevs.h

diff --git a/hw/mips_cpudevs.h b/hw/mips_cpudevs.h
new file mode 100644
index 0000000..db82b41
--- /dev/null
+++ b/hw/mips_cpudevs.h
@@ -0,0 +1,15 @@
+#ifndef HW_MIPS_CPUDEVS_H
+#define HW_MIPS_CPUDEVS_H
+/* Definitions for MIPS CPU internal devices.  */
+
+/* mips_addr.c */
+uint64_t cpu_mips_kseg0_to_phys(void *opaque, uint64_t addr);
+uint64_t cpu_mips_phys_to_kseg0(void *opaque, uint64_t addr);
+
+/* mips_int.c */
+void cpu_mips_irq_init_cpu(CPUState *env);
+
+/* mips_timer.c */
+void cpu_mips_clock_init(CPUState *);
+
+#endif