MIPS: RB532: Fix id usage in platform devices

When there is only platform device of the same type, id = -1
should be used, fix this.

Signed-off-by: Florian Fainelli <florian@openwrt.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/rb532/devices.c b/arch/mips/rb532/devices.c
index 7090dc9..31619c6 100644
--- a/arch/mips/rb532/devices.c
+++ b/arch/mips/rb532/devices.c
@@ -84,7 +84,7 @@
 };
 
 static struct platform_device korina_dev0 = {
-	.id = 0,
+	.id = -1,
 	.name = "korina",
 	.dev.platform_data = &korina_dev0_data,
 	.resource = korina_dev0_res,
@@ -108,7 +108,7 @@
 };
 
 static struct platform_device cf_slot0 = {
-	.id = 0,
+	.id = -1,
 	.name = "pata-rb532-cf",
 	.dev.platform_data = &cf_slot0_data,
 	.resource = cf_slot0_res,
@@ -173,7 +173,7 @@
 
 static struct platform_device rb532_led = {
 	.name = "rb532-led",
-	.id = 0,
+	.id = -1,
 };
 
 static struct gpio_keys_button rb532_gpio_btn[] = {