misc: ti-st: Kconfig & Makefile for TI_ST

Add the Kconfig and the Makefile for the TI_ST driver.
TI_ST driver is the line discipline driver for the Texas Instrument's
WiLink chipsets.
Also add the ti-st folder to list of drivers under drivers/misc.

Signed-off-by: Pavan Savoy <pavan_savoy@ti.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/misc/Kconfig b/drivers/misc/Kconfig
index 0b591b6..c36ee95 100644
--- a/drivers/misc/Kconfig
+++ b/drivers/misc/Kconfig
@@ -394,5 +394,6 @@
 source "drivers/misc/eeprom/Kconfig"
 source "drivers/misc/cb710/Kconfig"
 source "drivers/misc/iwmc3200top/Kconfig"
+source "drivers/misc/ti-st/Kconfig"
 
 endif # MISC_DEVICES