ARM: uniphier: do not compile v7_outer_cache_disable if L2 is disabled

If CONFIG_UNIPHIER_L2CACHE_ON is undefined, the L2 cache is never
enabled, so there is no need for v7_outer_cache_disable().  The weak
stub avoids the compile error anyway.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

arch/arm/mach-uniphier/arm32/cache-uniphier.c

@@ -183,7 +183,6 @@ void v7_outer_cache_enable(void)
 	tmp |= UNIPHIER_SSCC_ON;
 	writel(tmp, UNIPHIER_SSCC);
 }
-#endif
 
 void v7_outer_cache_disable(void)
 {
@@ -193,6 +192,7 @@ void v7_outer_cache_disable(void)
 	tmp &= ~UNIPHIER_SSCC_ON;
 	writel(tmp, UNIPHIER_SSCC);
 }
+#endif
 
 void enable_caches(void)
 {