ACPI EC: remove potential deadlock from EC.

From: Alexey Starikovskiy <astarikivskiy@suse.de>

Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de>
---

 drivers/acpi/ec.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/drivers/acpi/ec.c b/drivers/acpi/ec.c
index ceb7c3f..4b299fd 100644
--- a/drivers/acpi/ec.c
+++ b/drivers/acpi/ec.c
@@ -723,9 +723,7 @@ static int acpi_ec_add(struct acpi_device *device)
 	/* Check if we found the boot EC */
 	if (boot_ec) {
 		if (boot_ec->gpe == ec->gpe) {
-			mutex_lock(&boot_ec->lock);
 			ec_remove_handlers(boot_ec);
-			mutex_unlock(&boot_ec->lock);
 			mutex_destroy(&boot_ec->lock);
 			kfree(boot_ec);
 			first_ec = boot_ec = NULL;