KUALA LUMPUR, March 30 : Malaysia's Capital A Berhad named a senior banker as its deputy chief executive on Monday as the group looks to scale up its core businesses after spinning off its aviation arm to its affiliate, budget airline operator AirAsia X.  Effendy Shahul Hamid, a former CEO of consumer and digital banking at Malaysia's CIMB Group, will help spearhead growth, including exploring a plan to list the firm in Hong Kong by mid-year, Capital A founder and CEO Tony Fernandes said. "We'