raspberrypi inclusion
category: feature
bugzilla: 50432

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Signed-off-by: Npopcornmix <popcornmix@gmail.com>
Signed-off-by: NNoralf Trønnes <noralf@tronnes.org>

bcm2709: Drop platform smp and timer init code

irq-bcm2836 handles this through these functions:
bcm2835_init_local_timer_frequency()
bcm2836_arm_irqchip_smp_init()
Signed-off-by: NNoralf Trønnes <noralf@tronnes.org>

bcm270x: Use watchdog for reboot/poweroff

The watchdog driver already has support for reboot/poweroff.
Make use of this and remove the code from the platform files.
Signed-off-by: NNoralf Trønnes <noralf@tronnes.org>

board_bcm2835: Remove coherent dma pool increase - API has gone
Signed-off-by: NFang Yafen <yafen@iscas.ac.cn>
Signed-off-by: NZheng Zengkai <zhengzengkai@huawei.com>