Calling synchronize_irq() right before free_irq() is quite useless. On one
hand the IRQ can easily fire again before free_irq() is entered, on the
other hand free_irq() itself calls synchronize_irq() internally (in a race
condition free way), before any state associated with the IRQ is freed.

Patch was generated using the following semantic patch:
// <smpl>
@@
expression irq;
@@
-synchronize_irq(irq);
 free_irq(irq, ...);
// </smpl>
Signed-off-by: NLars-Peter Clausen <lars@metafoo.de>
Reviewed-by: NJitendra Bhivare <jitendra.bhivare@broadcom.com>
Signed-off-by: NMartin K. Petersen <martin.petersen@oracle.com>