m68k: Convert access_ok() to an inline function

Convert access_ok() from a macro to an inline function, so the compiler no
longer complains about unused variables:

    fs/read_write.c: In function 'rw_copy_check_uvector':
    fs/read_write.c:556: warning: unused variable 'buf'
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/asm-m68k/uaccess.h

@@ -14,7 +14,11 @@
 #define VERIFY_WRITE	1
 
 /* We let the MMU do all checking */
-#define access_ok(type,addr,size) 1
+static inline int access_ok(int type, const void __user *addr,
+			    unsigned long size)
+{
+	return 1;
+}
 
 /*
  * The exception table consists of pairs of addresses: the first is the