[coreboot] fix error conflicting types for ‘cbfs_find_file’ patch

[Николай Николаев]

hi

now i'm learning sources codes coreboot and filo

when i tried build coreboot with payload like a FILO
FILO fails with follow error: conflicting types for ‘cbfs_find_file’
similar like this post
http://www.coreboot.org/pipermail/coreboot/2011-October/066700.html
i have a empty Linux Centos 6.2
i just followed steps describe in how to build
http://www.coreboot.org/Build_HOWTO
git && make menuconfig && make

i wrote simple patch for solving this error

may be will this useful