qemu/arm-vexpress: update to use kernel 3.7.1

Bump to use kernel 3.7.1
Switch to hard float toolchain with NEON and VFP support.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>

board/qemu/arm-vexpress/readme.txt

@@ -5,4 +5,4 @@ Run the emulation with:
 The login prompt will appear in the terminal that started Qemu. The
 graphical window is the framebuffer.
 
-Tested with QEMU 1.2.0
+Tested with QEMU 1.3.0

configs/qemu_arm_vexpress_defconfig

@@ -1,22 +1,25 @@
 # Architecture
 BR2_arm=y
 BR2_cortex_a9=y
+BR2_ARM_ENABLE_NEON=y
+BR2_VFP_FLOAT=y
+# BR2_SOFT_FLOAT is not set
 
-# system
+# System
 BR2_ROOTFS_DEVICE_CREATION_DYNAMIC_MDEV=y
 BR2_TARGET_GENERIC_GETTY=y
 BR2_TARGET_GENERIC_GETTY_PORT="ttyAMA0"
 
-# filesystem
+# Filesystem
 BR2_TARGET_ROOTFS_EXT2=y
 # BR2_TARGET_ROOTFS_TAR is not set
 
-# Lock to 3.6 headers to avoid breaking with newer kernels
-BR2_KERNEL_HEADERS_3_6=y
+# Lock to 3.7 headers to avoid breaking with newer kernels
+BR2_KERNEL_HEADERS_3_7=y
 
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="3.6.6"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="3.7.1"
 BR2_LINUX_KERNEL_DEFCONFIG="vexpress"
 BR2_LINUX_KERNEL_ZIMAGE=y