fsp platfoms: add prototype & consolidate main entry-point

- In '-ffreestanding' main() is just as any other function and so
it needs a type-signature. Fixes a clang warning.

- Bay Trail and Rangeley have the updated romstage.c with the code
moved into the chipset, put the prototype in romstage.c.

- The sandybridge code has not been updated, so the prototype
for it goes into chipset_fsp_util.h, next to the prototype for
romstage_main_continue.

- Correct the return value of baytrail main() from void * to void
and remove the unnecessary asmlinkage tag. I'm surprised that this
didn't generate a warning...

Change-Id: I85ac0797d1e55d2b7ffdca039a52820d7827e704
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/7724
Tested-by: build bot (Jenkins)
Reviewed-by: Marc Jones <marc.jones@se-eng.com>
utils: Remove references to tracker from manpages

abuild, inteltool, and superiotool's manpages still referenced reporting
bugs to tracker.coreboot.org.  Remove that url and change the message
to point to the coreboot mailing list instead.

Change-Id: I7a85bc2b36ccdb7f3798a39a08345c1a02a67e65
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/7712
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>