arch: arc: use sys_cache instead of arch-function for enabling the cache

Use sys_cache_data_enable instead of arch_dcache_enable to enable
the cache. This will ensure that CONFIG_CACHE_MANAGEMENT
is considered correctly.

Signed-off-by: Benedikt Schmidt <benedikt.schmidt@embedded-solutions.at>

arch/arc/core/cache.c

@@ -218,8 +218,7 @@ int arch_icache_flush_and_invd_range(void *addr, size_t size)
 
 static int init_dcache(void)
 {
-
-	arch_dcache_enable();
+	sys_cache_data_enable();
 
 #if defined(CONFIG_DCACHE_LINE_SIZE_DETECT)
 	init_dcache_line_size();