[MIPS] generic txx9 gpio support

This is a board-independent TXx9 gpio API implementation using gpiolib.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index 9e1fc96..f4c313f 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -789,6 +789,11 @@
 config CSRC_SB1250
 	bool
 
+config GPIO_TXX9
+	select GENERIC_GPIO
+	select HAVE_GPIO_LIB
+	bool
+
 config CFE
 	bool