qemu/sparc: update to use kernel 3.6.6

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

board/qemu/sparc-ss10/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 1.1.1
+Tested with QEMU 1.2.0

configs/qemu_sparc_ss10_defconfig

@@ -6,12 +6,12 @@ BR2_sparc_supersparc=y
 BR2_TARGET_ROOTFS_EXT2=y
 # BR2_TARGET_ROOTFS_TAR is not set
 
-# Lock to 3.5 headers to avoid breaking with newer kernels
-BR2_KERNEL_HEADERS_3_5=y
+# Lock to 3.6 headers to avoid breaking with newer kernels
+BR2_KERNEL_HEADERS_3_6=y
 
 # Linux kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="3.5.4"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="3.6.6"
 BR2_LINUX_KERNEL_DEFCONFIG="sparc32"
 BR2_LINUX_KERNEL_ZIMAGE=y