ARM: shmobile: armadillo800eva: enable branch prediction on defconfig

Because defconfig disabled ARM branch prediction
by CONFIG_CPU_BPREDICT_DISABLE,
Armadillo800eva's Bogomips and Loop were not good performance.
This patch enabled Arm branch prediction.
Special thanks to Ishiyama-san

Reported-by: Kiyoshi Ishiyama <kiyoshi.ishiyama.wg@renesas.com>
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Kiyoshi Ishiyama <kiyoshi.ishiyama.wg@renesas.com>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>