ARM: OMAP4+: PRM: get rid of cpu_is_omap44xx calls from interrupt init

The compatible DT node is now passed with the prm init, so there is no
need to do node matching here again. Added a new flag to the init data
also, to detect default IRQ support for OMAP4. Also, any booting omap4
DT setup always has a PRM node, so there is no need to check against
the special case where it would be missing.

Signed-off-by: Tero Kristo <t-kristo@ti.com>
diff --git a/arch/arm/mach-omap2/prm_common.c b/arch/arm/mach-omap2/prm_common.c
index 04dfe8f..6832a31 100644
--- a/arch/arm/mach-omap2/prm_common.c
+++ b/arch/arm/mach-omap2/prm_common.c
@@ -669,7 +669,7 @@
 	.index = TI_CLKM_PRM,
 	.init = omap44xx_prm_init,
 	.device_inst_offset = OMAP4430_PRM_DEVICE_INST,
-	.flags = PRM_HAS_IO_WAKEUP | PRM_HAS_VOLTAGE,
+	.flags = PRM_HAS_IO_WAKEUP | PRM_HAS_VOLTAGE | PRM_IRQ_DEFAULT,
 };
 #endif