free_msi_irqs() is leaking memory, since list_for_each_entry(entry,
&dev->msi_list, list) {...} is never executed, because dev->msi_list is
made empty by the loop just above this one.

Fix it by relying on zero termination of attribute array like
populate_msi_sysfs() does.

Fixes: 1c51b50c ("PCI/MSI: Export MSI mode using attributes, not kobjects")
Signed-off-by: NAlexei Starovoitov <ast@plumgrid.com>
Signed-off-by: NBjorn Helgaas <bhelgaas@google.com>
Acked-by: NNeil Horman <nhorman@tuxdriver.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
CC: stable@vger.kernel.org	# v3.14+