[MIPS] Fix R4K cache macro names

Several machines have the R4K cache macro name spelled incorrectly.  Namely,
they have cpu_has_4kcache defined instead of cpu_has_4k_cache.

Signed-off-by: Joshua Kinard <kumba@gentoo.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/include/asm-mips/mach-mips/cpu-feature-overrides.h b/include/asm-mips/mach-mips/cpu-feature-overrides.h
index e06af6c..12c9372 100644
--- a/include/asm-mips/mach-mips/cpu-feature-overrides.h
+++ b/include/asm-mips/mach-mips/cpu-feature-overrides.h
@@ -17,7 +17,7 @@
 #ifdef CONFIG_CPU_MIPS32
 #define cpu_has_tlb		1
 #define cpu_has_4kex		1
-#define cpu_has_4kcache		1
+#define cpu_has_4k_cache	1
 /* #define cpu_has_fpu		? */
 /* #define cpu_has_32fpr	? */
 #define cpu_has_counter		1
@@ -47,7 +47,7 @@
 #ifdef CONFIG_CPU_MIPS64
 #define cpu_has_tlb		1
 #define cpu_has_4kex		1
-#define cpu_has_4kcache		1
+#define cpu_has_4k_cache	1
 /* #define cpu_has_fpu		? */
 /* #define cpu_has_32fpr	? */
 #define cpu_has_counter		1