On the MPC8548 devices we have multiple I2C-MPC buses however they are on the
same interrupt line. Made request_irq pass SA_SHIRQ now so the second bus can
register for the same IRQ.
Signed-off-by: Kumar Gala <kumar.gala@freescale.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>