MIPS: TXx9: 7 segment LED support

Add sysfs interface for 7 segment LED and implement access routine for
RBTX4939.

Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/txx9/Kconfig b/arch/mips/txx9/Kconfig
index 17052db..5a176ea 100644
--- a/arch/mips/txx9/Kconfig
+++ b/arch/mips/txx9/Kconfig
@@ -49,6 +49,7 @@
 	bool "Toshiba RBTX4939 bobard"
 	depends on MACH_TX49XX
 	select SOC_TX4939
+	select TXX9_7SEGLED
 	help
 	  This Toshiba board is based on the TX4939 processor. Say Y here to
 	  support this machine type
@@ -86,6 +87,9 @@
 	select HW_HAS_PCI
 	select PCI_TX4927
 
+config TXX9_7SEGLED
+	bool
+
 config TOSHIBA_FPCIB0
 	bool "FPCIB0 Backplane Support"
 	depends on PCI && MACH_TXX9