[PATCH] input: soc_button_array: fix IRQ-related build errors

[Randy Dunlap <rdunlap@xxxxxxxxxxxxx>]

Fix these new build errors by adding <linux/irq.h>:

../drivers/input/misc/soc_button_array.c: In function ‘soc_button_device_create’:
../drivers/input/misc/soc_button_array.c:156:4: error: implicit declaration of function ‘irq_set_irq_type’; did you mean ‘acpi_dev_get_irq_type’? [-Werror=implicit-function-declaration]
    irq_set_irq_type(irq, IRQ_TYPE_LEVEL_LOW);
  CC [M]  drivers/rtc/rtc-ds1343.o
../drivers/input/misc/soc_button_array.c:156:26: error: ‘IRQ_TYPE_LEVEL_LOW’ undeclared (first use in this function)
    irq_set_irq_type(irq, IRQ_TYPE_LEVEL_LOW);

Fixes: 78a5b53e9fb4 ("Input: soc_button_array - work around DSDTs which modify the irqflags")
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Cc: Hans de Goede <hdegoede@xxxxxxxxxx>
Cc: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
Cc: linux-input@xxxxxxxxxxxxxxx
---
 drivers/input/misc/soc_button_array.c |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20201123.orig/drivers/input/misc/soc_button_array.c
+++ linux-next-20201123/drivers/input/misc/soc_button_array.c
@@ -9,6 +9,7 @@
 #include <linux/module.h>
 #include <linux/input.h>
 #include <linux/init.h>
+#include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/acpi.h>
 #include <linux/dmi.h>