armv7: rename cache related CONFIG flags

Replace the cache related CONFIG flags with more meaningful
names. Following are the changes:

CONFIG_L2_OFF	     -> CONFIG_SYS_L2CACHE_OFF
CONFIG_SYS_NO_ICACHE -> CONFIG_SYS_ICACHE_OFF
CONFIG_SYS_NO_DCACHE -> CONFIG_SYS_DCACHE_OFF

Signed-off-by: Aneesh V <aneesh@ti.com>
V2:
 * Changed CONFIG_L2_OFF -> CONFIG_SYS_NO_L2CACHE
V4:
 * Changed all three flags to the final names suggested as above
   and accordingly changed the commit message
diff --git a/include/configs/B2.h b/include/configs/B2.h
index 7846a92..e181fa8 100644
--- a/include/configs/B2.h
+++ b/include/configs/B2.h
@@ -38,7 +38,8 @@
 #define CONFIG_B2			1	/* on an B2 Board      */
 #define CONFIG_ARM_THUMB	1	/* this is an ARM7TDMI */
 #undef  CONFIG_ARM7_REVD		/* disable ARM720 REV.D Workarounds */
-#define CONFIG_SYS_NO_CP15_CACHE
+#define CONFIG_SYS_ICACHE_OFF
+#define CONFIG_SYS_DCACHE_OFF
 #define CONFIG_ARCH_CPU_INIT
 
 #define CONFIG_S3C44B0_CLOCK_SPEED	75 /* we have a 75Mhz S3C44B0*/