qemu/mips64-malta: update to use kernel 3.5.4

Update to use the latest kernel 3.5.4.
And also update to the latest .config knobs, otherwise we were just
building a mips(32) target which failed miserably.
This config is still flaky, you get a login prompt but usually fail to
login, passing along an init=/bin/sh helps some but crashes are quite
usual.

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

configs/qemu_mips64_malta_defconfig

@@ -1,6 +1,5 @@
 # Architecture
-BR2_mips=y
-BR2_mips_64=y
+BR2_mips64=y
 BR2_MIPS_NABI64=y
 
 # Toolchain
@@ -14,9 +13,9 @@ BR2_TARGET_ROOTFS_EXT2=y
 # Kernel
 BR2_LINUX_KERNEL=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION=y
-BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="3.3.8"
+BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="3.5.4"
 BR2_LINUX_KERNEL_USE_CUSTOM_CONFIG=y
-BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/mips64-malta/linux-3.3.config"
+BR2_LINUX_KERNEL_CUSTOM_CONFIG_FILE="board/qemu/mips64-malta/linux-3.5.config"
 BR2_LINUX_KERNEL_VMLINUX=y
 
 # Serial port config