arm: bcmbca: replace ARCH_BCM6858 symbols in Kconfig with BCM6858

As CONFIG_ARCH_BCM6858 is replaced with CONFIG_BCM6858, update the
driver Kconfig to use the new config symbol.

Signed-off-by: William Zhang <william.zhang@broadcom.com>
Reviewed-by: Philippe Reynes <philippe.reynes@softathome.com>
diff --git a/drivers/led/Kconfig b/drivers/led/Kconfig
index bd8f23f..98f015a 100644
--- a/drivers/led/Kconfig
+++ b/drivers/led/Kconfig
@@ -37,7 +37,7 @@
 
 config LED_BCM6858
 	bool "LED Support for BCM6858"
-	depends on LED && (BCM6856 || ARCH_BCM6858 || BCM63158)
+	depends on LED && (BCM6856 || BCM6858 || BCM63158)
 	help
 	  This option enables support for LEDs connected to the BCM6858
 	  HW has blinking capabilities and up to 32 LEDs can be controlled.