hw/vesa: Don't ignore fatal errors

Failling an mmap call or creating a memslot means that device emulation
will not work, don't ignore it.

Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
1 file changed