ifx6x60: SPI protocol driver for Infineon 6x60 modem

Prototype driver for the IFX6x60 series of SPI attached modems by Jim
Stanley and Russ Gorby

Signed-off-by: Russ Gorby <richardx.r.gorby@intel.com>

[Some reworking and a major cleanup]

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index aff9dcd..0b9cc17 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -1632,4 +1632,10 @@
 	help
 	  Enable a Altera UART port to be the system console.
 
+config SERIAL_IFX6X60
+        tristate "SPI protocol driver for Infineon 6x60 modem (EXPERIMENTAL)"
+	depends on GPIOLIB && EXPERIMENTAL
+	help
+	  Support for the IFX6x60 modem devices on Intel MID platforms.
+
 endmenu