parser: simplify code by keeping a pointer to the current operand

parser: simplify code by keeping a pointer to the current operand

There is an awful lot of syntax-heavy "result->oprs[operand]" going
on; simplify by making a pointer to the current operand.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Signed-off-by: Jin Kyu Song <jin.kyu.song@intel.com>

• [DBH] parser.c