MIPS: ath25: add early printk support

Signed-off-by: Sergey Ryazanov <ryazanov.s.a@gmail.com>
Cc: Linux MIPS <linux-mips@linux-mips.org>
Patchwork: https://patchwork.linux-mips.org/patch/8241/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 6569168..3348989 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -107,6 +107,7 @@
 	select SYS_HAS_CPU_MIPS32_R1
 	select SYS_SUPPORTS_BIG_ENDIAN
 	select SYS_SUPPORTS_32BIT_KERNEL
+	select SYS_HAS_EARLY_PRINTK
 	help
 	  Support for Atheros AR231x and Atheros AR531x based boards