ARM: OMAP4+: PRM: remove "wkup" event

"wkup" event at bit offset 0 exists only on OMAP3.
OMAP4430/60 PRM_IRQSTATUS_A9, OMAP5/DRA7 PRM_IRQSTATUS_MPU

register bit 0 is DPLL_CORE_RECAL_ST not wakeup event like OMAP3.

The same applies to AM437x as well.

Remove the wrong definition.
Signed-off-by: NNishanth Menon <nm@ti.com>
Acked-by: NSantosh Shilimkar <santosh.shilimkar@ti.com>

arch/arm/mach-omap2/prm44xx.c

@@ -33,7 +33,6 @@
 /* Static data */
 
 static const struct omap_prcm_irq omap4_prcm_irqs[] = {
-	OMAP_PRCM_IRQ("wkup",   0,      0),
 	OMAP_PRCM_IRQ("io",     9,      1),
 };