um: trap: fix spelling mistake, EACCESS -> EACCES

Trivial fix to a spelling mistake of the error access name EACCESS,
rename to EACCES

Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Richard Weinberger <richard@nod.at>

arch/um/kernel/trap.c

@@ -19,7 +19,7 @@
 #include <skas.h>
 
 /*
- * Note this is constrained to return 0, -EFAULT, -EACCESS, -ENOMEM by
+ * Note this is constrained to return 0, -EFAULT, -EACCES, -ENOMEM by
  * segv().
  */
 int handle_page_fault(unsigned long address, unsigned long ip,