Fixed unsigned power of two division under 6809.

Author: spotlessmind1975

ugbc/src/targets/common/6809/_init.c

@@ -50,6 +50,7 @@ void setup_embedded( Environment * _environment ) {
     _environment->embedded.cpu_math_mul_8bit_to_16bit = 1;
     _environment->embedded.cpu_math_div_8bit_to_8bit = 1;
     _environment->embedded.cpu_math_div2_const_8bit = 1;
+    _environment->embedded.cpu_math_div2_const_16bit = 1;
     _environment->embedded.cpu_math_mul_16bit_to_32bit = 1;
     _environment->embedded.cpu_math_div_16bit_to_16bit = 1;
     _environment->embedded.cpu_math_div_32bit_to_16bit = 1;