Input: unified force feedback support for memoryless devices

Consolidate core implementing memoryless devices in one module; added
support for gain and envelopes and periodic => rumble conversion.

Signed-off-by: Anssi Hannula <anssi.hannula@gmail.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
diff --git a/drivers/input/Makefile b/drivers/input/Makefile
index abdc9d4..a005b1d 100644
--- a/drivers/input/Makefile
+++ b/drivers/input/Makefile
@@ -7,6 +7,8 @@
 obj-$(CONFIG_INPUT)		+= input-core.o
 input-core-objs := input.o ff-core.o
 
+obj-$(CONFIG_INPUT_FF_MEMLESS)	+= ff-memless.o
+
 obj-$(CONFIG_INPUT_MOUSEDEV)	+= mousedev.o
 obj-$(CONFIG_INPUT_JOYDEV)	+= joydev.o
 obj-$(CONFIG_INPUT_EVDEV)	+= evdev.o