x86: Add CONFIG_LBA48 and remove CONFIG_ATAPI in x86-common.h

Enable CONFIG_LBA48 to support large disks. CONFIG_ATAPI is only needed
by cmd_ide.c which is not common for modern x86 targets, hence remove it.

Signed-off-by: Bin Meng <bmeng.cn@gmail.com>
Acked-by: Simon Glass <sjg@chromium.org>