This patch corrects the watchdog register setting. To update watchdog
register, the watchdog mode key must be set to make the register
configurable.

Change-Id: I9ca98ea4012f7f220b116013461030de4638ce0b
Signed-off-by: Jimmy Huang <jimmy.huang@mediatek.com>

- Boot up 4 cores.
- Add a generic UART driver.
- Add generic CPU helper functions
- Supoort suspend
- Add system_off & system_reset implementation
- Add crash console reporting implementation
- Add get_sys_suspend_power_state() for PSCI 1.0 SYSTEM_SUSPEND
- Add Mediatek SIP runtime service
- Add delay timer platform implementation

Change-Id: I44138249f115ee10b9cbd26fdbc2dd3af04d825f
Signed-off-by: CC Ma <cc.ma@mediatek.com>
Signed-off-by: Jimmy Huang <jimmy.huang@mediatek.com>