cmd: cpu: refactor to ensure devices are probed and improve code style

Use uclass_first_device and uclass_next_device in order to avoid exceptions
for drivers that aren't probed when cpu ops are requested.
Improve code style and fix indentations.
Fix incorrect line break when cpu info is not available.
Remove unneeded brackets.

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

cmd/cpu.c

 /*
  * Copyright (c) 2015 Google, Inc
  * Written by Simon Glass <sjg@chromium.org>
+ * Copyright (c) 2017 Álvaro Fernández Rojas <noltari@gmail.com>
  *
  * SPDX-License-Identifier:	GPL-2.0+
  */
@@ -21,20 +22,15 @@ static const char *cpu_feature_name[CPU_FEAT_COUNT] = {
 static int print_cpu_list(bool detail)
 {
 	struct udevice *dev;
-	struct uclass *uc;
 	char buf[100];
-	int ret;
 
-	ret = uclass_get(UCLASS_CPU, &uc);
-	if (ret) {
-		printf("Cannot find CPU uclass\n");
-		return ret;
-	}
-	uclass_foreach_dev(dev, uc) {
+	for (uclass_first_device(UCLASS_CPU, &dev);
+		     dev;
+		     uclass_next_device(&dev)) {
 		struct cpu_platdata *plat = dev_get_parent_platdata(dev);
 		struct cpu_info info;
-		bool first;
-		int i;
+		bool first = true;
+		int ret, i;
 
 		ret = cpu_get_desc(dev, buf, sizeof(buf));
 		printf("%3d: %-10s %s\n", dev->seq, dev->name,
@@ -45,13 +41,12 @@ static int print_cpu_list(bool detail)
 		if (ret) {
 			printf("\t(no detail available");
 			if (ret != -ENOSYS)
-				printf(": err=%d\n", ret);
+				printf(": err=%d", ret);
 			printf(")\n");
 			continue;
 		}
 		printf("\tID = %d, freq = ", plat->cpu_id);
 		print_freq(info.cpu_freq, "");
-		first = true;
 		for (i = 0; i < CPU_FEAT_COUNT; i++) {
 			if (info.features & (1 << i)) {
 				printf("%s%s", first ? ": " : ", ",
@@ -60,10 +55,9 @@ static int print_cpu_list(bool detail)
 			}
 		}
 		printf("\n");
-		if (info.features & (1 << CPU_FEAT_UCODE)) {
+		if (info.features & (1 << CPU_FEAT_UCODE))
 			printf("\tMicrocode version %#x\n",
 			       plat->ucode_version);
-		}
 		if (info.features & (1 << CPU_FEAT_DEVICE_ID))
 			printf("\tDevice ID %#lx\n", plat->device_id);
 	}
@@ -71,7 +65,8 @@ static int print_cpu_list(bool detail)
 	return 0;
 }
 
-static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc, char *const argv[])
+static int do_cpu_list(cmd_tbl_t *cmdtp, int flag, int argc,
+		       char *const argv[])
 {
 	if (print_cpu_list(false))
 		return CMD_RET_FAILURE;
@@ -97,7 +92,7 @@ static cmd_tbl_t cmd_cpu_sub[] = {
  * Process a cpu sub-command
  */
 static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
-		       char * const argv[])
+		  char * const argv[])
 {
 	cmd_tbl_t *c = NULL;
 
@@ -106,7 +101,8 @@ static int do_cpu(cmd_tbl_t *cmdtp, int flag, int argc,
 	argv++;
 
 	if (argc)
-		c = find_cmd_tbl(argv[0], cmd_cpu_sub, ARRAY_SIZE(cmd_cpu_sub));
+		c = find_cmd_tbl(argv[0], cmd_cpu_sub,
+				 ARRAY_SIZE(cmd_cpu_sub));
 
 	if (c)
 		return c->cmd(cmdtp, flag, argc, argv);