sys/linux/l2cap.txt: add A2MP, SMP and CID_CONN_LESS descriptors

[koczkatamas]

I've run make extract TARGETOS=linux SOURCEDIR=$KSRC (on latest mainline), make generate, make and make presubmit without errors before submitting the PR.

I've got the following warnings for make extract, but I think it's not related to my change, so I ignored them:

sys.txt: ARCH_ENABLE_TAGGED_ADDR is unsupported on all arches (typo?)
prctl.txt: ARCH_SHSTK_WRSS is unsupported on all arches (typo?)
sys.txt: ARCH_SHSTK_UNLOCK is unsupported on all arches (typo?)
sys.txt: __NR_map_shadow_stack is unsupported on all arches (typo?)
sys.txt: ARCH_SHSTK_ENABLE is unsupported on all arches (typo?)
sys.txt: ARCH_GET_MAX_TAG_BITS is unsupported on all arches (typo?)
sys.txt: ARCH_SHSTK_DISABLE is unsupported on all arches (typo?)
sys.txt: ARCH_GET_UNTAG_MASK is unsupported on all arches (typo?)
sys.txt: ARCH_SHSTK_LOCK is unsupported on all arches (typo?)
prctl.txt: ARCH_SHSTK_SHSTK is unsupported on all arches (typo?)
sys.txt: ARCH_FORCE_TAGGED_SVA is unsupported on all arches (typo?)
sys.txt: ARCH_SHSTK_STATUS is unsupported on all arches (typo?)

[codecov]

Codecov Report

Merging #3829 (e14a463) into master (2b32bd3) will increase coverage by 0.0%.
The diff coverage is n/a.

see 4 files with indirect coverage changes

[a-nogikh]

I've got the following warnings for make extract, but I think it's not related to my change, so I ignored them:

Did it update other .txt.const files than sys/linux/l2cap.txt.const? If yes, it might be because there's some problem in your environment and it's just unable to extract const files for other architectures. Are all needed cross compilers installed on your machine?