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

+4
+4
Documentation/usb/acm.txt
··· 46 47 3Com USR ISDN Pro TA 48 49 Unfortunately many modems and most ISDN TAs use proprietary interfaces and 50 thus won't work with this drivers. Check for ACM compliance before buying. 51
··· 46 47 3Com USR ISDN Pro TA 48 49 + Some cell phones also connect via USB. I know the following phones work: 50 + 51 + SonyEricsson K800i 52 + 53 Unfortunately many modems and most ISDN TAs use proprietary interfaces and 54 thus won't work with this drivers. Check for ACM compliance before buying. 55