cmake: make formatting of install statements follow one pattern

Change-Id: Ib7d571af629b0af78397a411b0cca409a6d218d8
diff --git a/include/grgsm/flow_control/CMakeLists.txt b/include/grgsm/flow_control/CMakeLists.txt
index d86f1c7..6feee61 100644
--- a/include/grgsm/flow_control/CMakeLists.txt
+++ b/include/grgsm/flow_control/CMakeLists.txt
@@ -20,7 +20,8 @@
 ########################################################################
 # Install public header files
 ########################################################################
-install(FILES
+install(
+    FILES
     common.h
     burst_timeslot_splitter.h
     burst_sdcch_subslot_splitter.h
@@ -28,6 +29,7 @@
     burst_sdcch_subslot_filter.h
     burst_fnr_filter.h
     burst_type_filter.h
-    dummy_burst_filter.h 
-    uplink_downlink_splitter.h DESTINATION include/grgsm/flow_control
+    dummy_burst_filter.h
+    uplink_downlink_splitter.h
+    DESTINATION include/grgsm/flow_control
 )