cdcacm_autostart: handle USB with no data lines

[dakejahl]

Fixes logic if USB does not have data lines, ie powering the flight controller with USB wall wart. The module will stay in the connecting state and px4_open() will fail silently.

Closes #23179

[PetervdPerk-NXP]

@dagar @davids5
With #22234 being backported to 1.15 now, this fix should also be backported to 1.15

[dk7xe]

@dagar @davids5 indeed because that is what happens when i power the FMU from an USB power bank for bench testing after commit d8655fd had been merged into release/1.15

HW arch: PX4_FMU_V6XRT
HW type: V6XRT
HW FMUM ID: 0x000
HW BASE ID: 0x003
PX4 git-hash: d8655fdde9f45ab244f78a991f38fa7f73d86a69
PX4 version: 1.15.0 80 (17760384)
PX4 git-branch: release/1.15
OS: NuttX
OS version: Release 11.0.0 (184549631)
OS git-hash: 6fbb26eb521999844f099ac93974fdc7cc[hardfault_log] Fault Log info File No 4 Length 8205 flags:0x00 state:1
[hardfault_log] Fault Log is Armed
ca6016
Build datetime: Jun  5 2024 22:32:59
Build uri: localhost
Build variant: default
Toolchain: GNU GCC, 9.3.1 20200408 (release)
PX4GUID: 000900000000000000008292807c2c2a800e
MCU: i.MX RT1170 rB0, rev. 0
.................
NuttShell (NSH) NuttX-11.0.0
nsh> sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
WARN  [mavlink] no broadcasting address found
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
INFO  [gps] u-blox firmware version: SPG 3.01
INFO  [gps] u-blox protocol version: 18.00
INFO  [gps] u-blox module: NEO-M8N-0
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
sercon: Registering CDC/ACM serial driver
sercon: Successfully registered the CDC/ACM serial driver
serdis: Disconnected
..... forever

[davids5]

@AlexKlimaj Please backport da35c4a as it is need with the other ones you backported