arm64: macro whitespace fixes

While working on arch/arm64/include/asm/uaccess.h, I noticed
that one macro within this header is made harder to read because it
violates a coding style rule: space is missing after comma.

Fix it up.

Signed-off-by: Michael S. Tsirkin <[e-mail]>
Acked-by: Will Deacon <[e-mail]>

arch/arm64/include/asm/uaccess.h

···
 	current_thread_info()->addr_limit = fs;
 }
 
-#define segment_eq(a,b)	((a) == (b))
+#define segment_eq(a, b)	((a) == (b))
 
 /*
  * Return 1 if addr < current->addr_limit, 0 otherwise.