hw/escc: Drop duplicate definition of 'disabled' property

Drop a duplicate definition of the 'disabled' property from
the escc qdev property list: this redefinition is currently
effectively ignored but will become an error. (The duplication
was inadvertently introduced in 2009 in commit ec02f7de.)
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Acked-by: NAndreas Färber <afaerber@suse.de>
Signed-off-by: NBlue Swirl <blauwirbel@gmail.com>

hw/escc.c

@@ -905,7 +905,6 @@ static Property escc_properties[] = {
     DEFINE_PROP_UINT32("frequency", SerialState, frequency,   0),
     DEFINE_PROP_UINT32("it_shift",  SerialState, it_shift,    0),
     DEFINE_PROP_UINT32("disabled",  SerialState, disabled,    0),
-    DEFINE_PROP_UINT32("disabled",  SerialState, disabled,    0),
     DEFINE_PROP_UINT32("chnBtype",  SerialState, chn[0].type, 0),
     DEFINE_PROP_UINT32("chnAtype",  SerialState, chn[1].type, 0),
     DEFINE_PROP_CHR("chrB", SerialState, chn[0].chr),