fix(intel): fix UART baud rate and clock

Revise the UART baud rate and clock for general platform build,
SIMIC build and EMU build.

Signed-off-by: Sieu Mun Tang <sieu.mun.tang@intel.com>
Change-Id: I62fefe7b96d5124e75d2810b4fbc1640422b1353
4 files changed