OMAP3: PM: Ensure PRCM interrupts are cleared at boot

Any pending PRCM interrupts can prevent retention.  Ensure
they are cleared during boot.
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>

arch/arm/mach-omap2/pm34xx.c

@@ -613,6 +613,9 @@ static void __init prcm_setup_regs(void)
 	/* Clear any pending PRCM interrupts */
 	prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
 
+	/* Clear any pending PRCM interrupts */
+	prm_write_mod_reg(0, OCP_MOD, OMAP3_PRM_IRQSTATUS_MPU_OFFSET);
+
 	omap3_iva_idle();
 	omap3_d2d_idle();
 }