src/include: Fix space between type, * and variable name

Fix the following errors detected by checkpatch.pl:

ERROR: "foo * bar" should be "foo *bar"
ERROR: "foo* bar" should be "foo *bar"
ERROR: "foo*bar" should be "foo *bar"

TEST=Build and run on Galileo Gen2

Change-Id: I5a3ff8b92e3ceecb4ddf45d8840454d5310fc6b3
Signed-off-by: Lee Leahy <Leroy.P.Leahy@intel.com>
Reviewed-on: https://review.coreboot.org/18655
Reviewed-by: Martin Roth <martinroth@google.com>
Tested-by: build bot (Jenkins)

src/include/cpu/x86/lapic.h

@@ -77,7 +77,7 @@ struct __xchg_dummy { unsigned long a[100]; };
  * Note 2: xchg has side effect, so that attribute volatile is necessary,
  *	  but generally the primitive is invalid, *ptr is output argument. --ANK
  */
-static inline unsigned long __xchg(unsigned long x, volatile void * ptr, int size)
+static inline unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
 {
 	switch (size) {
 		case 1: