intel/i945: Use "IS_ENABLED" for fsbclk & memclk

Change-Id: I3213a8664955239b10bcf1784ce1ba5e0d95688b
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/16958
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>
1 file changed