KEVIN MAZUR/GETTY Madonna’s still “Living for Love” — and for her family. On Friday night, the pop icon hosted a star-studded fundraiser for her Raising Malawi charity, which her 11-year-old son David Banda attended and spoke onstage. The mother-son outing came just a week before Madonna, 58, will be honored as Billboard ‘s Woman of the Year in New York City at the industry publication’s annual awards. Monday, the singer’s Billboard cover interview by actress-filmmaker Elizabeth Banks dropped, and Madonna opened up about her relationship with her four children: Lourdes , 20, Rocco , 16, David Banda and Mercy James , 10. “My family is everything. I will go to war for them. Whatever I’m fighting for, it’s for my daughters and my sons. I want them to have a good future,” the Madonna: Rebel Heart Tour star, 58, said in the candid conversation with Banks. MERT ALAS & MARCUS PIGGOTT “I’ve created an unconventional family, and we have discussions at the