board: ti: am43xx: enable QSPI and Gbit Ethernet on AM437x SK

AM437x Starter Kit has a qspi flash and gbit ethernet
support. By muxing those signals, we can use those
interfaces from u-boot.

Signed-off-by: Felipe Balbi <balbi@ti.com>

board/ti/am43xx/mux.c

@@ -97,6 +97,9 @@ void enable_board_pin_mux(void)
 	if (board_is_gpevm()) {
 		configure_module_pin_mux(gpio5_7_pin_mux);
 		configure_module_pin_mux(rgmii1_pin_mux);
+	} else if (board_is_sk()) {
+		configure_module_pin_mux(rgmii1_pin_mux);
+		configure_module_pin_mux(qspi_pin_mux);
 	} else if (board_is_eposevm()) {
 		configure_module_pin_mux(rmii1_pin_mux);
 		configure_module_pin_mux(qspi_pin_mux);