gs201: Build pvmfw.img through the Android framework

Enable building pvmfw.img through PRODUCT_BUILD_PVMFW_IMAGE for products
that currently enable pKVM. Note that the board-provided
BOARD_PREBUILT_PVMFWIMAGE may still overshadow that flag.

Bug: 199831815
Test: m ${ANDROID_PRODUCT_OUT}/pvmfw.img
Change-Id: Iefd5fcf1ce04b14b37ff9555db9acabffb010cff
1 file changed