lmb: remove the lmb_init_and_reserve() function

lmb: remove the lmb_init_and_reserve() function

With the changes to make the LMB reservations persistent, the common
memory regions are being added during board init. Remove the
now superfluous lmb_init_and_reserve() function.

Signed-off-by: Sughosh Ganu <sughosh.ganu@linaro.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>