fix rpi fpu configuration

target/config/Config.in.fpu.choice

@@ -3,7 +3,7 @@
 
 config ADK_TARGET_ARCH_ARM_WITH_NEON
 	bool "enable NEON SIMD support"
-	depends on ADK_TARGET_ARCH_ARM
+	depends on ADK_TARGET_ARCH_ARM && ADK_TARGET_CPU_WITH_NEON
 	default n
 	help
 	  Enable support for NEON SIMD CPU extensions.

target/config/Config.in.fpu.default

@@ -4,6 +4,7 @@
 config ADK_TARGET_FPU
 	string
 	depends on ADK_TARGET_ARCH_ARM
+	default "vfp" if ADK_TARGET_CPU_WITH_FPU_VFP
 	default "vfpv3-fp16" if ADK_CPU_CORTEX_A5 && !ADK_TARGET_ARCH_ARM_WITH_NEON
 	default "vfpv4" if ADK_CPU_CORTEX_A7 && !ADK_TARGET_ARCH_ARM_WITH_NEON
 	default "vfpv3" if ADK_CPU_CORTEX_A8 && !ADK_TARGET_ARCH_ARM_WITH_NEON