pdn: Fix flags documentation.

Signed-off-by: Christian Costa <[email protected]>

src/pdn/README.md

@@ -27,7 +27,6 @@ pdngen
     [-reset]
     [-ripup]
     [-skip_trim]
-    [-verbose]
 ```
 
 #### Options
@@ -123,8 +122,8 @@ define_pdn_grid
     [-obstructions list_of_layers]
     [-orient list_of_valid_orientations]
     [-pins list_of_pin_layers]
-    [-power_control_network STAR|DAISY]
     [-power_control signal_name]
+    [-power_control_network STAR|DAISY]
     [-power_switch_cell name]
     [-starts_with POWER|GROUND]
     [-voltage_domains list_of_domain_names]
@@ -168,7 +167,7 @@ define_power_switch_cell
     -ground ground_pin
     -name name
     -power unswitched_power_pin
-    -power_switchable power_switchable_pin
+    -switched_power power_switchable_pin
     [-acknowledge acknowledge_pin_name]
 ```
 
@@ -302,10 +301,8 @@ add_pdn_ring
     [-core_offsets offset_value]
     [-extend_to_boundary]
     [-grid grid_name]
-    [-ground_pads pads]
     [-nets list_of_nets]
     [-pad_offsets offset_value]
-    [-power_pads pads]
     [-starts_with POWER|GROUND]
 
 ```