dts: bindings: espi: Change the property names in the DTS

Rename the following properties in bindings and DTS:

-- io_girq =>io-girq
-- vw_girqs => vw-girqs
-- pc_girq => pc-girq
-- poll_timeout => poll-timeout
-- poll_interval => poll-interval
-- consec_rd_timeout => consec-rd-timeout
-- sus_chk_delay => sus-chk-delay
-- sus_rsm_interval => sus-rsm-interval

Signed-off-by: James Roy <rruuaanng@outlook.com>