L2SDP-1032, apply vhdl_style assert/report rule

Closes L2SDP-1032

applications/lofar1/RSP/pft2/src/vhdl/pft_bf(rtl).vhd

@@ -352,5 +352,6 @@ begin
   end process;
   end generate;
 
-  assert c_regbank_size >= c_pipeline severity FAILURE;
+  assert c_regbank_size >= c_pipeline
+    severity FAILURE;
 end rtl;