1. Use RT_USING_LIBC instead of RT_USING_NEWLIB in the beagonebone.
2. Enable LIBC in default in LPC4088.
3. Remove the unnecessary interrupt clean in STM32 UART;
4. Use HSE_VALUE to calculate PLL_M in STM32F2/F4;
It tested by DP83848 RMII with external 50MHz OSC PHY mode
if you want use another PHY IC please modify Libraries\STM32F2x7_ETH_Driver\inc\stm32f2x7_eth_conf.h
git-svn-id: https://rt-thread.googlecode.com/svn/trunk@2086 bbd45198-f89e-11dd-88c7-29a3b14d5316