build: CMake fix for sim:btuart

[Jasinsky]

Summary

CMake build was broken with undefined reference to bt_bridge_register function.

[9/11] Linking C executable nuttx
FAILED: nuttx 
: && /usr/bin/cc  -Wl,--gc-sections -Wl,-no-pie -Wl,-Ttext-segment=0x40000000 -Wl,-z,noexecstack -T nuttx.ld @CMakeFiles/nuttx.rsp -o nuttx && :
/usr/bin/ld: nuttx.rel: in function `bt_driver_register_with_id':
/home/dan/priv/nuttx/nuttx/drivers/wireless/bluetooth/bt_driver.c:100: undefined reference to `bt_bridge_register'

It was because bt_bridge.c file is missing in drivers/wireless/bluetooth/CMakeLists.txt.

Impact

Minor impact, makefile based build worked fine, CMake based build is fixed now.

Testing

Host used:

Linux 6.8.0-51-generic #52~22.04.1-Ubuntu SMP PREEMPT_DYNAMIC Mon Dec  9 15:00:52 UTC 2 x86_64 x86_64 x86_64 GNU/Linux

gcc (Ubuntu 11.4.0-1ubuntu1~22.04) 11.4.0

Target:

cmake .. -G Ninja -DBOARD_CONFIG=sim:btuart