drivers: cache: andes: Fix incorrect DT_PROP usage

Remove redundant quotation marks when parsing
cache line size from DTS properties.

Signed-off-by: Wei-Tai Lee <wtlee@andestech.com>

drivers/cache/cache_andes.c

@@ -536,7 +536,7 @@ static int andes_cache_init(void)
 		cache_cfg.instr_line_size = CONFIG_ICACHE_LINE_SIZE;
 #elif DT_NODE_HAS_PROP(DT_PATH(cpus, cpu_0), i_cache_line_size)
 		cache_cfg.instr_line_size =
-			DT_PROP(DT_PATH(cpus, cpu_0), "i_cache_line_size");
+			DT_PROP(DT_PATH(cpus, cpu_0), i_cache_line_size);
 #else
 		LOG_ERR("Please specific the i-cache-line-size "
 			"CPU0 property of the DT");
@@ -560,7 +560,7 @@ static int andes_cache_init(void)
 		cache_cfg.data_line_size = CONFIG_DCACHE_LINE_SIZE;
 #elif DT_NODE_HAS_PROP(DT_PATH(cpus, cpu_0), d_cache_line_size)
 		cache_cfg.data_line_size =
-			DT_PROP(DT_PATH(cpus, cpu_0), "d_cache_line_size");
+			DT_PROP(DT_PATH(cpus, cpu_0), d_cache_line_size);
 #else
 		LOG_ERR("Please specific the d-cache-line-size "
 			"CPU0 property of the DT");