monitor/rfcomm: Fix not printing userdata in UIH frame with credits
monitor/rfcomm: Fix not printing userdata in UIH frame with credits

> ACL Data RX: Handle 7 flags 0x02 dlen 19              [hci0] 8.723738
      Channel: 65 len 15 [PSM 3 mode 0] {chan 1}
      RFCOMM: Unnumbered Info with Header Check (UIH)(0xef)
         Address: 0x09 cr 0 dlci 0x02
         Control: 0xff poll/final 1
         Length: 10
         FCS: 0x5c
         Credits: 1
        41 54 2b 43 49 4e 44 3d 3f 0d 5c               AT+CIND=?.\

mapfau/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,pstglia/external-bluetooth-bluez,mapfau/bluez,ComputeCycles/bluez,silent-snowman/bluez,mapfau/bluez,ComputeCycles/bluez,silent-snowman/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,silent-snowman/bluez,ComputeCycles/bluez,pkarasev3/bluez,mapfau/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,pkarasev3/bluez