MIPS: Introduce HAS_RAPIDIO Kconfig option

Introduce the same option as PPC and ARM already have because
RAPIDIO can function in the absence of PCI.

Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Acked-by: Alexandre Bounine <alex.bou9@gmail.com>
Signed-off-by: Paul Burton <paul.burton@mips.com>
Patchwork: https://patchwork.linux-mips.org/patch/19987/
Cc: linux-mips@linux-mips.org
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: James Hogan <jhogan@kernel.org>
Cc: Matt Porter <mporter@kernel.crashing.org>
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig
index a6ce508..b7fa44d 100644
--- a/arch/mips/Kconfig
+++ b/arch/mips/Kconfig
@@ -3104,10 +3104,13 @@
 
 source "drivers/pcmcia/Kconfig"
 
+config HAS_RAPIDIO
+	bool
+	default n
+
 config RAPIDIO
 	tristate "RapidIO support"
-	depends on PCI
-	default n
+	depends on HAS_RAPIDIO || PCI
 	help
 	  If you say Y here, the kernel will include drivers and
 	  infrastructure code to support RapidIO interconnect devices.