src/include: Remove unnecessary typecast

Fix the following warning detected by checkpatch.pl:

WARNING: Unnecessary typecast of c90 int constant

TEST=Build and run on Galileo Gen2

Change-Id: I137efa55e945d1315322df2a38d70716a3807a1e
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18658
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
1 file changed