Fix this:
xilinx_ll_temac.c: In function 'xilinx_ll_temac_initialize':
xilinx_ll_temac.c:332: warning: assignment from incompatible pointer type
xilinx_ll_temac.c:340: warning: assignment from incompatible pointer type
Signed-off-by: Stephan Linz <linz@li-pro.net>