[ARM] Orion: fix bug in pcie configuration cycle function field mask
The function field is 3 bits.
Signed-off-by: Saeed Bishara <saeed@marvell.com>
Signed-off-by: Nicolas Pitre <nico@marvell.com>
authored by Saeed Bishara and committed by Nicolas Pitre 82676d76 020f9706