kernel: config updated to include better bridge support

Support for bridging in the kernel was added recently, but failed to
fully support it. This patch is essentially a 'refresh'.

Signed-off-by: Pushpal Sidhu <psidhu@gateworks.com>
recipes-kernel: bump kernel recipe

Adds legacy pci irq mapping support.

See Gateworks/linux-imx6/commit/b5914e98f51a1f286070b919d7cc416c64b809cd
for more details.

Signed-off-by: Pushpal Sidhu <psidhu@gateworks.com>