drm/sun4i: Realign Makefile padding and reorder it

Some options were not padded as they should, and the order in the Makefile
was chaotic. Fix that.
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Link: https://patchwork.freedesktop.org/patch/msgid/9410b284ec97453fa692537dffaaa4fb4833347c.1508231063.git-series.maxime.ripard@free-electrons.com

drivers/gpu/drm/sun4i/Makefile

+sun4i-backend-y			+= sun4i_backend.o sun4i_layer.o
+
 sun4i-drm-y			+= sun4i_drv.o
 sun4i-drm-y			+= sun4i_framebuffer.o
 
+sun4i-drm-hdmi-y		+= sun4i_hdmi_ddc_clk.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_enc.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_i2c.o
-sun4i-drm-hdmi-y += sun4i_hdmi_ddc_clk.o
 sun4i-drm-hdmi-y		+= sun4i_hdmi_tmds_clk.o
 
+sun8i-mixer-y			+= sun8i_mixer.o sun8i_layer.o
+
+sun4i-tcon-y			+= sun4i_crtc.o
+sun4i-tcon-y			+= sun4i_dotclock.o
 sun4i-tcon-y			+= sun4i_tcon.o
 sun4i-tcon-y			+= sun4i_rgb.o
-sun4i-tcon-y += sun4i_dotclock.o
-sun4i-tcon-y += sun4i_crtc.o
-
-sun4i-backend-y += sun4i_backend.o sun4i_layer.o
 
-sun8i-mixer-y += sun8i_mixer.o sun8i_layer.o
-
-obj-$(CONFIG_DRM_SUN4I)		+= sun4i-drm.o sun4i-tcon.o
-obj-$(CONFIG_DRM_SUN4I)		+= sun6i_drc.o
+obj-$(CONFIG_DRM_SUN4I)		+= sun4i-drm.o
+obj-$(CONFIG_DRM_SUN4I)		+= sun4i-tcon.o
 obj-$(CONFIG_DRM_SUN4I)		+= sun4i_tv.o
+obj-$(CONFIG_DRM_SUN4I)		+= sun6i_drc.o
 
 obj-$(CONFIG_DRM_SUN4I_BACKEND)	+= sun4i-backend.o
 obj-$(CONFIG_DRM_SUN4I_HDMI)	+= sun4i-drm-hdmi.o