Fix max bytes in an AT Command response
Fix max bytes in an AT Command response

This patch fix a wrong maximum number of bytes in an AT Command response.
It has an impact in SMS reception.

Resolves: LE-5362
Change-Id: I5db3ea19f82d2d61e89bc1ac5d7d2e810dd8d036

legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af,legatoproject/legato-af