arm-linux-gnueabihf: don't assume VFPv4 by default

VFPv4 support is nothing that should be assumed on generic Armv7-A
architectures. Instead, set the architecture to armv7-a+fp which implies
an VFPv3 by default. This brings us in line with other standard cross
compilers, like on Debian.

Author: jkloetzke

recipes/devel/cross-toolchain.yaml

@@ -145,9 +145,8 @@ multiPackage:
         environment:
             AUTOCONF_TARGET: "arm-linux-gnueabihf"
             ARCH: "arm"
-            GCC_TARGET_ARCH: "armv7-a"
+            GCC_TARGET_ARCH: "armv7-a+fp"
             GCC_TARGET_FLOAT_ABI: "hard"
-            GCC_TARGET_FPU: "vfpv4"
             GCC_LIBC: "glibc"
 
     # ARMv7 bare metal toolchain with newlib libc