[MIPS] 64-bit TO_PHYS_MASK macro for RM9000 processors

Signed-off-by: Andrew Sharp <tigerand@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

include/asm-mips/addrspace.h

@@ -133,6 +133,7 @@
     || defined (CONFIG_CPU_R4X00)					\
     || defined (CONFIG_CPU_R5000)					\
     || defined (CONFIG_CPU_RM7000)					\
+    || defined (CONFIG_CPU_RM9000)					\
     || defined (CONFIG_CPU_NEVADA)					\
     || defined (CONFIG_CPU_TX49XX)					\
     || defined (CONFIG_CPU_MIPS64)