nb/intel/ironlake/northbridge.c: Improve readability

This cosmetic change does 2 things:
- change bitwise shifting to division
- Make the division by / KiB explicit for fixed legacy ranges like
  0xa0000-0xbffff.

Change-Id: If4e05f496abc05e06a944b244824376f3937a57b
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49621
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

0 files changed, 0 insertions, 0 deletions