Tyan S8226: Fix incompatible pointer warning

Fix warning:
  mptable.c:52, GNU Compiler 4 (gcc), Priority: Normal
  passing argument 3 of 'mptable_write_buses' from incompatible pointer type [enabled by default]

mptable_write_buses is expecting a pointer to an int, so I changed the
U8 isa_bus to an int to match.  A U8 doesn't make sense if the value could
be greater than 255 - certainly unlikely, but possible since the value
of isa_bus gets set to the maximum PCI bus number + 1.

Change-Id: I7ea416f48285922d6cf341382109993fd3f6405c
Signed-off-by: Martin Roth <martin.roth@se-eng.com>
Reviewed-on: http://review.coreboot.org/2450
Tested-by: build bot (Jenkins)
Reviewed-by: Siyuan Wang <wangsiyuanbuaa@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Dave Frodin <dave.frodin@se-eng.com>
Reviewed-by: Marc Jones <marcj303@gmail.com>
2 files changed