arch/arm: cortex-m4 may have an FPv4 FPU

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

arch/Config.in.arm

@@ -267,6 +267,7 @@ config BR2_cortex_m3
 config BR2_cortex_m4
 	bool "cortex-M4"
 	select BR2_ARM_CPU_HAS_THUMB2
+	select BR2_ARM_CPU_MAYBE_HAS_FPV4
 	select BR2_ARM_CPU_ARMV7M
 config BR2_cortex_m7
 	bool "cortex-M7"