tbs2910: fix lost characters on serial input

With enabled console_mux for serial input and usb keyboard sometimes
characters get lost when typing too fast at the serial input (pasting
strings in serial console window). Fix this by using INT_QUEUE for
polling the usb keyboard.

Signed-off-by: Soeren Moch <smoch@web.de>

include/configs/tbs2910.h

@@ -167,7 +167,7 @@
 #define CONFIG_USB_STORAGE
 #define CONFIG_USB_KEYBOARD
 #ifdef CONFIG_USB_KEYBOARD
-#define CONFIG_SYS_USB_EVENT_POLL
+#define CONFIG_SYS_USB_EVENT_POLL_VIA_INT_QUEUE
 #define CONFIG_SYS_STDIO_DEREGISTER
 #define CONFIG_PREBOOT "if hdmidet; then usb start; fi"
 #endif /* CONFIG_USB_KEYBOARD */