avr32: fix umount2 syscall entry
avr32: fix umount2 syscall entry

* linux/avr32/syscallent.h: Rename umount to umount2.

kapdop/android_external_strace,Distrotech/strace,cuviper/strace,cuviper/strace,Distrotech/strace,Saruta/strace,kapdop/android_external_strace,kapdop/android_external_strace,Saruta/strace,Distrotech/strace,kapdop/android_external_strace,kapdop/android_external_strace,Distrotech/strace,cuviper/strace,cuviper/strace,Saruta/strace,cuviper/strace,Saruta/strace,Saruta/strace,Distrotech/strace