[clang] [clang][SPIR-V] Fix OpenCL addrspace mapping when using non-zero default AS (PR #137187)

[Dmitry Sidorov via cfe-commits]

https://github.com/MrSidims approved this pull request.

This change is LGTM, but I'm starting to wonder, if those maps (with the only difference in default) can be unified and `setAddressSpaceMap` function changed appropriately. 

https://github.com/llvm/llvm-project/pull/137187