fsp: update with correct U-Boot header file path

Only enable the fsp support codes build when CONFIG_INTEL_FSP is on
in arch/x86/lib/Makefile.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
crownbay: enable FSP support in the board configuration file

CONFIG_FSP_LOCATION is set to 0xfffc0000 per Intel FSP document for
Queens Bay and it must match with the firmware image to be used.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>