grub: re-add fat/nt file system modules

apparently some people use fat file systems for /boot
on linux systems

this is apparently a thing

it's ridiculous, but also a thing

a user reported they could not boot their t400 because
of those, because they have such a distro installed
on their machine

apparently it was a gentoo user

i don't really care. re-add 1980s dos file system support.

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

config/grub/modules.list

@@ -38,8 +38,10 @@ diskfilter \
 echo \
 ehci \
 eval \
+exfat \
 elf \
 ext2 \
+fat \
 f2fs \
 gcry_arcfour \
 gcry_blowfish \
@@ -101,6 +103,7 @@ multiboot \
 multiboot2 \
 nativedisk \
 normal \
+ntfs \
 ohci \
 part_bsd \
 part_dfly \