hardware: replace VCCPLL regulator with RC network

Having a full regulator on VCCPLL causes the ESD network in the ICE40 to
freak out, dumping VCCPLL into GND and trying very hard to burn out the
regulator.

Replace it with a simple RC filter network, which is less clean but
results in a happier ESD network.

Signed-off-by: Sean Cross <sean@xobs.io>

hardware/pcb/tomu-fpga-cache.lib

@@ -28,7 +28,6 @@ F2 "" 0 0 50 V I C CNN
 F3 "" 0 0 50 V I C CNN
 $FPLIST
  TO-???*
- *SingleDiode
  *_Diode_*
  *SingleDiode*
  D_*
@@ -133,6 +132,19 @@ X GND 1 0 0 0 D 50 50 1 1 W N
 ENDDRAW
 ENDDEF
 #
+# power:PWR_FLAG
+#
+DEF power:PWR_FLAG #FLG 0 0 N N 1 F P
+F0 "#FLG" 0 75 50 H I C CNN
+F1 "power:PWR_FLAG" 0 150 50 H V C CNN
+F2 "" 0 0 50 H I C CNN
+F3 "" 0 0 50 H I C CNN
+DRAW
+P 6 0 1 0 0 0 0 50 -40 75 0 100 40 75 0 50 N
+X pwr 1 0 0 0 U 50 50 0 0 w
+ENDDRAW
+ENDDEF
+#
 # tomu-fpga:Case
 #
 DEF tomu-fpga:Case XX 0 40 Y Y 1 F N