MIPS: mm: scache: Add secondary cache support for MIPS R6 cores

The secondary cache initialization and configuration code is processor
specific so we need to handle MIPS R6 cores as well.

Signed-off-by: Markos Chandras <markos.chandras@imgtec.com>
diff --git a/arch/mips/mm/sc-mips.c b/arch/mips/mm/sc-mips.c
index fd9b5d4..4ceafd1 100644
--- a/arch/mips/mm/sc-mips.c
+++ b/arch/mips/mm/sc-mips.c
@@ -105,7 +105,8 @@
 
 	/* Ignore anything but MIPSxx processors */
 	if (!(c->isa_level & (MIPS_CPU_ISA_M32R1 | MIPS_CPU_ISA_M32R2 |
-			      MIPS_CPU_ISA_M64R1 | MIPS_CPU_ISA_M64R2)))
+			      MIPS_CPU_ISA_M32R6 | MIPS_CPU_ISA_M64R1 |
+			      MIPS_CPU_ISA_M64R2 | MIPS_CPU_ISA_M64R6)))
 		return 0;
 
 	/* Does this MIPS32/MIPS64 CPU have a config2 register? */