board: ls1043ardb: Modify pin-muxing code for USB and QE-HDLC

QE-HDLC and USB multi-use the pins, modify the pin-muxing code
for them, when set "hwconfig=qe-hdlc" in uboot, assign the pins
to QE-HDLC, if not, assgin it to USB

Signed-off-by: Zhao Qiang <qiang.zhao@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>
1 file changed