disp: msm: sde: remove drm_irq header

Remove deprecated/unused header inclusion.

Change-Id: I0b0adc155b154c05f814c02cbff4945484896963
Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>

msm/sde_rsc.c

@@ -19,7 +19,6 @@
 #include <linux/module.h>
 
 #include <soc/qcom/rpmh.h>
-#include <drm/drm_irq.h>
 #include "msm_drv.h"
 #include "sde_rsc_priv.h"
 #include "sde_dbg.h"