linux-imx

LF-283 gpu: imx: dpu: common: Get irq count properly

Since of_irq_count() is not exported as a symbol, we cannot
find it's definition when imx-dpu-core is built as a module.
To address this issue, this patch calls platform_irq_count()
to get irq count instead.

Reviewed-by: Peng Fan <peng.fan@nxp.com>
Signed-off-by: Liu Ying <victor.liu@nxp.com>