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/string.h

@@ -16,7 +16,7 @@ void *memset(void *s, int c, size_t n);
 int memcmp(const void *s1, const void *s2, size_t n);
 void *memchr(const void *s, int c, size_t n);
 #if !defined(__ROMCC__)
-int snprintf(char * buf, size_t size, const char *fmt, ...);
+int snprintf(char *buf, size_t size, const char *fmt, ...);
 #endif
 
 // simple string functions