configs/bananapi_m1: use NEON+VFPv4 as FPU strategy

Allwinner A20 supports NEON+VFPv4 so let's enable instead of the default
VFPv4-D16.

Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com>
Reviewed-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

configs/bananapi_m1_defconfig

@@ -1,5 +1,6 @@
 BR2_arm=y
 BR2_cortex_a7=y
+BR2_ARM_FPU_NEON_VFPV4=y
 BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_4_18=y
 BR2_TARGET_GENERIC_ISSUE="Welcome to Bananapi M1"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"