Renamed lvs guard to use_power_pins

- Also, added guard to the cells in the custom memory
- dropped DLVS from the dv Makefiles
diff --git a/verilog/rtl/gpio_control_block.v b/verilog/rtl/gpio_control_block.v
index 681da94..bca5aa3 100644
--- a/verilog/rtl/gpio_control_block.v
+++ b/verilog/rtl/gpio_control_block.v
@@ -43,7 +43,7 @@
     parameter ASEL_INIT = 1'b0,
     parameter APOL_INIT = 1'b0
 ) (
-    `ifdef LVS
+    `ifdef USE_POWER_PINS
          inout vccd,
          inout vssd,
          inout vccd1,