mfd: cros_ec: cleanup: cros_ec.c is GPL licensed, like all the others.

This module has always been GPL licensed. It was just missing the explicit
declaration to avoid tainting the kernel.

Signed-off-by: Bill Richardson <wfrichar@chromium.org>
Signed-off-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
diff --git a/drivers/mfd/cros_ec.c b/drivers/mfd/cros_ec.c
index 783fe2e..fae69b1 100644
--- a/drivers/mfd/cros_ec.c
+++ b/drivers/mfd/cros_ec.c
@@ -184,3 +184,6 @@
 EXPORT_SYMBOL(cros_ec_resume);
 
 #endif
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("ChromeOS EC core driver");