Set CONFIG_GRUB2_EXTRA_MODULES from the Kconfig when building GRUB2.
This causes the specified modules to actually enter the built payload.
Change-Id: I345026af705ba8af77c6c12aba8e1bd4135e519c
Signed-off-by: Benjamin Barenblat <bbaren@google.com>
Reviewed-on: https://review.coreboot.org/15203
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Vladimir Serbinenko <phcoder@gmail.com>