mm/vmalloc.c:4691:25: error: variable 'addr' is uninitialized when used here [-Werror,-Wuninitialized]

[Naresh Kamboju]

Following build failures noticed on i386 and x86 with clang builds on the
Linux next-20240111 tag.

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

Build error:
----------
mm/vmalloc.c:4691:25: error: variable 'addr' is uninitialized when
used here [-Werror,-Wuninitialized]
 4691 |                 va = __find_vmap_area(addr, &vn->busy.root);
      |                                       ^~~~
mm/vmalloc.c:4684:20: note: initialize the variable 'addr' to silence
this warning
 4684 |         unsigned long addr;
      |                           ^
      |                            = 0
1 error generated.

Links:
 - https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20240111/testrun/22036090/suite/build/test/clang-lkftconfig/details/

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