grub: only enable nvme if needed on a board

remove nvme support from the "default" grub tree

now there are three trees:

* default: no xhci or nvme patches
* nvme: contains nvme support
* xhci: contains xhci and nvme support

this is in case a bug like lbmk issue #216 ever occurs
again, as referenced before during lbmk audit 5

there is no indication that the nvme patch causes any
issues, but after previous experience i want to be sure

Signed-off-by: Leah Rowe <leah@libreboot.org>

config/data/grub/module/default

@@ -103,7 +103,6 @@ multiboot2 \
 nativedisk \
 normal \
 ntfs \
-nvme \
 ohci \
 part_bsd \
 part_dfly \