qemu/ppc-g3beige: update to use kernel 3.7.1

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

board/qemu/powerpc-g3beige/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_ppc_g3beige_defconfig

@@ -6,15 +6,15 @@ BR2_powerpc_750=y
 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_USE_CUSTOM_CONFIG=y
-BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/powerpc-g3beige/linux-3.6.config"
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/powerpc-g3beige/linux-3.7.config"
 BR2_LINUX_KERNEL_VMLINUX=y
 
 # Serial port config