drm/amd/display: Reorganize DCN30 Makefile

DCN30 has a lot of files in the Makefile, and adding each one next to
the other makes it hard to read and can increase the chance of merge
conflicts. This commit just reorganize the Makefile to put each file
associated with DCN30 in its own line.
Reviewed-by: Chris Park <chris.park@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Rodrigo Siqueira <rodrigo.siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn30/Makefile

-# 
+#
 # Copyright 2020 Advanced Micro Devices, Inc.
-# 
+#
 # Permission is hereby granted, free of charge, to any person obtaining a
 # copy of this software and associated documentation files (the "Software"),
 # to deal in the Software without restriction, including without limitation
 # the rights to use, copy, modify, merge, publish, distribute, sublicense,
 # and/or sell copies of the Software, and to permit persons to whom the
 # Software is furnished to do so, subject to the following conditions:
-# 
+#
 # The above copyright notice and this permission notice shall be included in
 # all copies or substantial portions of the Software.
-# 
+#
 # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
@@ -18,17 +18,31 @@
 # OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 # ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 # OTHER DEALINGS IN THE SOFTWARE.
-# 
+#
 # Authors: AMD
-# 
-# 
+#
+#
+
+DCN30 := \
+	dcn30_init.o \
+	dcn30_hubbub.o \
+	dcn30_hubp.o \
+	dcn30_dpp.o \
+	dcn30_optc.o \
+	dcn30_dccg.o \
+	dcn30_hwseq.o \
+	dcn30_mpc.o dcn30_vpg.o \
+	dcn30_afmt.o \
+	dcn30_dio_stream_encoder.o \
+	dcn30_dwb.o \
+	dcn30_dpp_cm.o \
+	dcn30_dwb_cm.o \
+	dcn30_cm_common.o \
+	dcn30_mmhubbub.o \
+	dcn30_resource.o \
+	dcn30_dio_link_encoder.o
 
 
-DCN30 = dcn30_init.o dcn30_hubbub.o dcn30_hubp.o dcn30_dpp.o dcn30_optc.o \
-	dcn30_dccg.o dcn30_hwseq.o dcn30_mpc.o dcn30_vpg.o \
-	dcn30_afmt.o dcn30_dio_stream_encoder.o dcn30_dwb.o \
-	dcn30_dpp_cm.o dcn30_dwb_cm.o dcn30_cm_common.o dcn30_mmhubbub.o \
-	dcn30_dio_link_encoder.o dcn30_resource.o
 
 AMD_DAL_DCN30 = $(addprefix $(AMDDALPATH)/dc/dcn30/,$(DCN30))