Extend the ELOG errors for EC fan.

Change-Id: Ida98f81b1ac1f6b3ba16c0b98e5c64756606fd58
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: https://gerrit.chromium.org/gerrit/48318
Reviewed-by: Stefan Reinauer <reinauer@google.com>
Tested-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/4126
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>
Tested-by: build bot (Jenkins)

src/include/elog.h

@@ -87,6 +87,7 @@
 #define EC_EVENT_KEYBOARD_RECOVERY         0x0f
 #define EC_EVENT_THERMAL_SHUTDOWN          0x10
 #define EC_EVENT_BATTERY_SHUTDOWN          0x11
+#define EC_EVENT_FAN_ERROR                 0x12
 
 /* Power */
 #define ELOG_TYPE_POWER_FAIL              0x92