Code cleanup, especially MIPS for GCC 4.x

CHANGELOG

board/Marvell/db64360/mv_eth.c

board/Marvell/db64460/mv_eth.c

board/esd/cpci2dp/cpci2dp.c

board/esd/cpci750/mv_eth.c

board/evb64260/eth_addrtbl.c

board/incaip/flash.c

board/incaip/incaip.c

board/incaip/lowlevel_init.S

board/mpc8260ads/mpc8260ads.c

board/prodrive/p3p440/p3p440.c

board/tqm834x/config.mk

board/tqm834x/pci.c

board/tqm834x/tqm834x.c

cpu/mcf52x2/fec.c

cpu/mips/incaip_clock.c

cpu/mpc83xx/speed.c

cpu/mpc8xx/config.mk

cpu/ppc4xx/spd_sdram.c

doc/README.OFT