USB: small update to Documentation/usb/acm.txt
USB: small update to Documentation/usb/acm.txt

this docu update mentions that cell phones also use cdc-acm.

Signed-off-by: Oliver Neukum <c539153ba1f947bd4b6f910263b967c4a0a62357@neukum.name>


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