arch: arm: Add support for different cache lines.

Change-Id: I9b6ed05e09d272be1479f5f356529c29e87fcb14
diff --git a/arch/arm/include/arch/defines.h b/arch/arm/include/arch/defines.h
index 1fa74fc..7201fbf 100644
--- a/arch/arm/include/arch/defines.h
+++ b/arch/arm/include/arch/defines.h
@@ -33,6 +33,8 @@
 #elif defined(ARM_CPU_CORE_SCORPION)
  #define CACHE_LINE 32
 #elif defined(ARM_CPU_CORE_KRAIT)
+ #define CACHE_LINE 128
+#elif defined(ARM_CPU_CORE_A7)
  #define CACHE_LINE 64
 #else
  #error unknown cpu