ANDROID: mm: vmalloc: export vmap_ apis

Export below symbols:
 vmap_pages_range_noflush
 __vmap_pages_range_noflush

These API are used to map the pages to kernel virtual address. These
symbols are used to map a region, outside of the DDR, which can be still
treated like DDR(think of like addressable TCM), on our targets.

Bug: 436986667
Bug: 435443840
Change-Id: Id5a9683b6468b33b60866fdea80478baf4582bd2
Signed-off-by: Charan Teja Kalla <quic_charante@quicinc.com>