arm64: defconfig: Enable PFUZE100 regulator

This is needed to boot correctly from eMMC on the i.MX8MQ EVK board.

Signed-off-by: Carlo Caione <ccaione@baylibre.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>