V4L/DVB (3782): Removed uneeded stuff from pwc Makefile

Signed-off-by: NMauro Carvalho Chehab <mchehab@infradead.org>

drivers/media/video/pwc/Makefile

-ifneq ($(KERNELRELEASE),)
-
 pwc-objs	:= pwc-if.o pwc-misc.o pwc-ctrl.o pwc-uncompress.o pwc-timon.o pwc-kiara.o
 
 obj-$(CONFIG_USB_PWC) += pwc.o
-
-else
-
-KDIR := /lib/modules/$(shell uname -r)/build
-PWD := $(shell pwd)
-
-default:
-	$(MAKE) -C $(KDIR) SUBDIRS=$(PWD) modules
-
-endif
-
-clean:
-	rm -f *.[oas] .*.flags *.ko .*.cmd .*.d .*.tmp *.mod.c
-	rm -rf .tmp_versions
-