Staging: mrst-touchscreen: Fix wrong Makefile config

The config name is wrong in drivers/staging/Makefile...
The object name is wrong in drivers/staging/mrst-touchscreen/Makefile...
Signed-off-by: Alek Du <alek.du@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/staging/Makefile

@@ -51,7 +51,7 @@ obj-$(CONFIG_CXT1E1)		+= cxt1e1/
 obj-$(CONFIG_TI_ST)		+= ti-st/
 obj-$(CONFIG_ADIS16255)		+= adis16255/
 obj-$(CONFIG_FB_XGI)		+= xgifb/
-obj-$(CONFIG_TOUCHSCREEN_MRSTOUCH)	+= mrst-touchscreen/
+obj-$(CONFIG_TOUCHSCREEN_INTEL_MID)	+= mrst-touchscreen/
 obj-$(CONFIG_MSM_STAGING)	+= msm/
 obj-$(CONFIG_EASYCAP)		+= easycap/
 obj-$(CONFIG_SOLO6X10)		+= solo6x10/

drivers/staging/mrst-touchscreen/Makefile

-obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) := intel_mid_touch.o
+obj-$(CONFIG_TOUCHSCREEN_INTEL_MID) := intel-mid-touch.o