Let the LED chip settle a bit before waking it from the bootloader. (#42)

At least for one person that helps to reliably get the LEDs working without
disconnecting/reconnecting the power to the board multiple times.

Co-authored-by: Tomasz bla Fortuna <bla@thera.be>

keyboards/annepro2/annepro2.c

@@ -51,7 +51,11 @@ void OVERRIDE keyboard_pre_init_kb(void) {
 #endif
     // Start LED UART
     sdStart(&SD0, &ledUartInitConfig);
+    /* Let the LED chip settle a bit before switching the mode.
+     * That helped at least one person. */
+    wait_ms(15);
     sdWrite(&SD0, ledMcuWakeup, 11);
+
     // wait to receive response from wakeup
     wait_ms(15);