mfd: ab8500: Pass AB8500 IRQ to debugfs code by resource

The AB8500 debug code which was merged in parallell with the
multiplatform work incidentally introduced a new instance using
the <mach/irqs.h> header which is now deleted, causing this
build regression:

drivers/mfd/ab8500-debugfs.c:95:23:
fatal error: mach/irqs.h: No such file or directory
compilation terminated.
make[4]: *** [drivers/mfd/ab8500-debugfs.o] Error 1

The code most certainly never worked with device tree either
since that does not rely on this kind of hard-coded interrupt
numbers.

Fix the problem at the root by passing it as a named resource
from the ab8500-core driver. Use an untyped resource to
stop the MFD core from remapping this IRQ relative to the
AB8500 irqdomain.

Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/ab8500-core.c

@@ -867,6 +867,15 @@ static struct resource ab8500_chargalg_resources[] = {};
 
 #ifdef CONFIG_DEBUG_FS
 static struct resource ab8500_debug_resources[] = {
+	{
+		.name	= "IRQ_AB8500",
+		/*
+		 * Number will be filled in. NOTE: this is deliberately
+		 * not flagged as an IRQ in ordet to avoid remapping using
+		 * the irqdomain in the MFD core, so that this IRQ passes
+		 * unremapped to the debug code.
+		 */
+	},
 	{
 		.name	= "IRQ_FIRST",
 		.start	= AB8500_INT_MAIN_EXT_CH_NOT_OK,
@@ -1712,6 +1721,12 @@ static int ab8500_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
+#if CONFIG_DEBUG_FS
+	/* Pass to debugfs */
+	ab8500_debug_resources[0].start = ab8500->irq;
+	ab8500_debug_resources[0].end = ab8500->irq;
+#endif
+
 	if (is_ab9540(ab8500))
 		ret = mfd_add_devices(ab8500->dev, 0, ab9540_devs,
 				ARRAY_SIZE(ab9540_devs), NULL,