stm32: stm32mp1: enable fpu feature

This flag needs to be set as the target has a Floating Point Unit (FPU).
If it's not set, everything is compiled with soft floating point support
(-msoft-float).

Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>

target/linux/stm32/stm32mp1/target.mk

@@ -7,6 +7,7 @@ BOARDNAME:=STM32MP1 boards
 ARCH:=arm
 CPU_TYPE:=cortex-a7
 CPU_SUBTYPE=neon-vfpv4
+FEATURES+=fpu
 KERNEL_IMAGES:=zImage
 
 DEFAULT_PACKAGES += blockdev kmod-gpio-button-hotplug