microblaze: Support early console on uart16550

Early console support reuse setting from U-BOOT that's why
it is not necessary to setup baudrates, etc.

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/arch/microblaze/Kconfig.debug b/arch/microblaze/Kconfig.debug
index e6e5e0d..e66e25c 100644
--- a/arch/microblaze/Kconfig.debug
+++ b/arch/microblaze/Kconfig.debug
@@ -10,7 +10,7 @@
 
 config EARLY_PRINTK
 	bool "Early printk function for kernel"
-	depends on SERIAL_UARTLITE_CONSOLE
+	depends on SERIAL_UARTLITE_CONSOLE || SERIAL_8250_CONSOLE
 	default n
 	help
 	  This option turns on/off early printk messages to console.