[PATCH -next] pnp: pnpbios: add header file to fix build errors

[Randy Dunlap]

From: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>

Fix build errors due to missing header file:

../drivers/pnp/pnpbios/core.c: In function 'pnp_dock_event':
../drivers/pnp/pnpbios/core.c:141:2: error: implicit declaration of function 'call_usermodehelper' [-Werror=implicit-function-declaration]
  value = call_usermodehelper(argv [0], argv, envp, UMH_WAIT_EXEC);
  ^
../drivers/pnp/pnpbios/core.c:141:52: error: 'UMH_WAIT_EXEC' undeclared (first use in this function)
  value = call_usermodehelper(argv [0], argv, envp, UMH_WAIT_EXEC);
                                                    ^
Signed-off-by: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
---
 drivers/pnp/pnpbios/core.c |    1 +
 1 file changed, 1 insertion(+)

--- linux-next-20160711.orig/drivers/pnp/pnpbios/core.c
+++ linux-next-20160711/drivers/pnp/pnpbios/core.c
@@ -60,6 +60,7 @@
 #include <linux/delay.h>
 #include <linux/acpi.h>
 #include <linux/freezer.h>
+#include <linux/kmod.h>
 #include <linux/kthread.h>
 
 #include <asm/page.h>