add loongarch support

[prcups]

Description

Add a comprehensive description of proposed changes

Fixes # - issue number(s) if exists

• [x] - git commit message contains an appropriate signed-off-by string (see CONTRIBUTING.md for details)

Type of change

Choose one or multiple, leave empty if none of the other choices apply

Add a respective label(s) to PR if you have permissions

• [ ] bug fix - change that fixes an issue
• [x] new feature - change that adds functionality
• [ ] tests - change in tests
• [ ] infrastructure - change in infrastructure and CI
• [ ] documentation - documentation update

Tests

• [ ] added - required for new features and some bug fixes
• [x] not needed

Documentation

• [ ] updated in # - add PR number
• [ ] needs to be updated
• [x] not needed

Breaks backward compatibility

• [ ] Yes
• [x] No
• [ ] Unknown

Notify the following users

@timmiesmith

Other information

[phprus]

@prcups I'm sorry, but I'm not an Intel employee.

[prcups]

@ekovanova Could you please review this patch for loongarch?

[ekovanova]

@prcups I've sent a request for help with this PR promotion to the oneTBB team.

[aleksei-fedotov]

The patch looks good to me.

Please update the PR description to accurately reflect what this change is about. Better to write by answering the questions what and why.

[prcups]

The patch looks good to me.

Please update the PR description to accurately reflect what this change is about. Better to write by answering the questions what and why.

Edited.