ioctl: simplify ioctl_decode signature
ioctl: simplify ioctl_decode signature

* ioctl.c (ioctl_decode): Remove 2nd and 3rd parameters.
(sys_ioctl): Update callers.

Saruta/strace,Saruta/strace,kapdop/android_external_strace,Distrotech/strace,cuviper/strace,Distrotech/strace,kapdop/android_external_strace,Distrotech/strace,vrastogi/strace,Saruta/strace,MonkeyZZZZ/platform_external_strace,Saruta/strace,vrastogi/strace,kapdop/android_external_strace,Saruta/strace,vrastogi/strace,MonkeyZZZZ/platform_external_strace,Distrotech/strace,kapdop/android_external_strace,cuviper/strace,vrastogi/strace,Distrotech/strace,MonkeyZZZZ/platform_external_strace,kapdop/android_external_strace,cuviper/strace,MonkeyZZZZ/platform_external_strace,vrastogi/strace,cuviper/strace,cuviper/strace,MonkeyZZZZ/platform_external_strace