lmb: Remove lmb_alloc_addr_flags()

lmb: Remove lmb_alloc_addr_flags()

lmb_alloc_addr() is just calling lmb_alloc_addr_flags() with LMB_NONE
There's not much we gain from this abstraction, so let's remove the
latter, add a flags argument to lmb_alloc_addr() and make the code a
bit easier to follow.

Reviewed-by: Sam Protsenko <[email protected]>
Tested-by: Sam Protsenko <[email protected]>
Signed-off-by: Ilias Apalodimas <[email protected]>