fpga: Arty A7's don't need multiple filesets

the XDC is identical between variants, so is the fileset

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

microwatt.core

@@ -68,14 +68,9 @@ filesets:
       - fpga/nexys-video.xdc : {file_type : xdc}
       - fpga/clk_gen_plle2.vhd : {file_type : vhdlSource-2008}
 
-  arty_a7-35:
+  arty_a7:
-    files:
-      - fpga/arty_a7-35.xdc : {file_type : xdc}
-      - fpga/clk_gen_plle2.vhd : {file_type : vhdlSource-2008}
-
-  arty_a7-100:
     files:
-      - fpga/arty_a7-35.xdc : {file_type : xdc}
+      - fpga/arty_a7.xdc : {file_type : xdc}
       - fpga/clk_gen_plle2.vhd : {file_type : vhdlSource-2008}
 
   cmod_a7-35:
@@ -102,7 +97,7 @@ targets:
 
   arty_a7-35:
     default_tool: vivado
-    filesets: [core, arty_a7-35, soc, fpga, debug_xilinx]
+    filesets: [core, arty_a7, soc, fpga, debug_xilinx]
     parameters : [memory_size, ram_init_file]
     tools:
       vivado: {part : xc7a35ticsg324-1L}
@@ -110,7 +105,7 @@ targets:
 
   arty_a7-100:
     default_tool: vivado
-    filesets: [core, arty_a7-100, soc, fpga, debug_xilinx]
+    filesets: [core, arty_a7, soc, fpga, debug_xilinx]
     parameters : [memory_size, ram_init_file]
     tools:
       vivado: {part : xc7a100ticsg324-1L}