Enable overvoltage

this improves reliability in my testing.

Author: jepler

runcpm-rp2040-dvi-usb/runcpm-pico/hardware/pico/feather_dvi.h

@@ -98,7 +98,8 @@ bool kbhit_serial1(void) {
 
 bool port_init_early() {
 #if USE_DISPLAY
-  // vreg_set_voltage(VREG_VOLTAGE_1_30);
+  vreg_set_voltage(VREG_VOLTAGE_1_20);
+  delay(10);
   if (!display.begin()) { return false; }
   _putch_hook = putch_display;
 #endif