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

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

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

authored by Oliver Neukum and committed by Greg Kroah-Hartman 684a0e70 ad1428c9

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Documentation/usb/acm.txt
··· 46 46 47 47 3Com USR ISDN Pro TA 48 48 49 + Some cell phones also connect via USB. I know the following phones work: 50 + 51 + SonyEricsson K800i 52 + 49 53 Unfortunately many modems and most ISDN TAs use proprietary interfaces and 50 54 thus won't work with this drivers. Check for ACM compliance before buying. 51 55