msm: camera: Use devm API to free irq

Use devm_free_irq() API to free IRQ because we
use the devm variant to request IRQ. Do this so
that the request and free variants of IRQ
request/free calls are in alignment with each other

CRs-Fixed: 2034833
Change-Id: Ic1b1980f510271b98277e8314b3f97606c24d741
Signed-off-by: Pavan Kumar Chilamkurthi <pchilamk@codeaurora.org>