dt-bindings: reset: meson-g12a: Add missing USB2 PHY resets

The G12A Documentation lacked these 2 reset lines, but they are present and
used for each USB 2 PHYs.

Add them to the dt-bindings for the upcoming USB support.

Fixes: dbfc54534dfc ("dt-bindings: reset: meson: add g12a bindings")
Signed-off-by: Neil Armstrong <[e-mail]>
Reviewed-by: Martin Blumenstingl <[e-mail]>
Signed-off-by: Philipp Zabel <[e-mail]>

include/dt-bindings/reset/amlogic,meson-g12a-reset.h

···
 #define RESET_SD_EMMC_A			44
 #define RESET_SD_EMMC_B			45
 #define RESET_SD_EMMC_C			46
-/*					47-60 */
+/*					47	*/
+#define RESET_USB_PHY20			48
+#define RESET_USB_PHY21			49
+/*					50-60	*/
 #define RESET_AUDIO_CODEC		61
 /*					62-63	*/
 /*	RESET2					*/