überXMHF (pc-intel-x86_32): fix build error when specifying configure --disable-drt parameter

This task fixes the build error when specifying configure --disable-drt and --disable-dmap parameters for überXMHF (x86_32) that is built with current generation überSpark tool-chain.

See: Building x86 uberapp for more details

Linked PRs:

Merges:

Revised OP to tie in PR for this task.

Using this PR, I can now build the micro-hypervisor successfully when configured --disable-drt --disable-dmap

Thanks @Cap. Updated OP with merge info and closing task/topic thread.