CYGHWR_HAL_POWERPC_BOARD_SPEED calculations

[John Dallaway]

Robert Chenault wrote:

> 2004-05-10  Robert Chenault <robertchenault@yahoo.com>
> 
> 	* src/quicc_smc_serial.h: Added two casts of (int) on
>         calculations involving CYGHWR_HAL_POWERPC_BOARD_SPEED.

Checked in.

John Dallaway
eCosCentric Limited