vidc: 1080p : Add support for slice delivery mode to encoder

Slice delivery mode enables confguring the encoder to deliver
one slice per output buffer. This mode is valid only for h264
codec when multi slice config is set to slice by mb.

Change-Id: Ibc9f3193faa3e1bc6009a6521475ef15966fc7c1
Signed-off-by: Pradnya Chaphekar <pradnyac@codeaurora.org>

Conflicts:

	drivers/video/msm/vidc/1080p/ddl/vcd_ddl_interrupt_handler.c
	drivers/video/msm/vidc/1080p/ddl/vcd_ddl_utils.h
	drivers/video/msm/vidc/1080p/ddl/vcd_ddl_vidc.c
	drivers/video/msm/vidc/1080p/ddl/vidc.c
	drivers/video/msm/vidc/common/vcd/vcd.h
	drivers/video/msm/vidc/common/vcd/vcd_sub.c
	include/linux/msm_vidc_enc.h
	include/media/msm/vcd_property.h