Doc: seq_file.txt fix wrong dd command example.
Doc: seq_file.txt fix wrong dd command example.

Small error in the "dd" command example, "out=" should be "of=".

Signed-off-by: Jesper Dangaard Brouer <62fac2f438bb80e18b3f6aa563e5ae0fa8eeefb9@comx.dk>
Signed-off-by: Jonathan Corbet <b2ce64d5587c02f12e367eac59751145a0660c51@lwn.net>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs