Extract clock information for UART, MMC & Watchdog from the platform
rather than hard code it

Signed-off-by: Hadi Asyrafi <muhammad.hadi.asyrafi.abdul.halim@intel.com>
Change-Id: I2582bd34a6da97bd75d5ccba5f93840e65f26b03

Watchdog driver support & enablement during platform setup

Signed-off-by: Muhammad Hadi Asyrafi Abdul Halim <muhammad.hadi.asyrafi.abdul.halim@intel.com>

This adds BL2 support for Intel Stratix 10 SoC FPGA.
Functionality includes:
- Release and setup peripherals from reset
- Calibrate DDR
- ECC DDR Scrubbing
- Load FIP (bl31 and bl33)

Signed-off-by: Loh Tien Hock <tien.hock.loh@intel.com>