arm: socfpga: remove note to add CONFIG_USB_DWC2_REG_ADDR

Now that the USB DWC2 probing is done from OF, remove this note to add
CONFIG_USB_DWC2_REG_ADDR.

Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>

include/configs/socfpga_common.h

@@ -233,13 +233,6 @@ unsigned int cm_get_qspi_controller_clk_hz(void);
 #ifdef CONFIG_CMD_USB
 #define CONFIG_USB_DWC2
 #define CONFIG_USB_STORAGE
-/*
- * NOTE: User must define either of the following to select which
- *       of the two USB controllers available on SoCFPGA to use.
- *       The DWC2 driver doesn't support multiple USB controllers.
- * #define CONFIG_USB_DWC2_REG_ADDR	SOCFPGA_USB0_ADDRESS
- * #define CONFIG_USB_DWC2_REG_ADDR	SOCFPGA_USB1_ADDRESS
- */
 #endif
 
 /*