drivers: core: use strcmp when find device by name

`if (!strncmp(dev->name, name, strlen(name)))` might find out
the wrong device, it might find out `dram_pll_ref_sel`, when name is
`dram_pll`. So use strcmp to avoid such issue.
Signed-off-by: NPeng Fan <peng.fan@nxp.com>
Reviewed-by: NSimon Glass <sjg@chromium.org>
Reviewed-by: NBin Meng <bmeng.cn@gmail.com>

drivers/core/uclass.c

@@ -260,7 +260,7 @@ int uclass_find_device_by_name(enum uclass_id id, const char *name,
 		return ret;
 
 	uclass_foreach_dev(dev, uc) {
-		if (!strncmp(dev->name, name, strlen(name))) {
+		if (!strcmp(dev->name, name)) {
 			*devp = dev;
 			return 0;
 		}