dts: npcx: do not switch eSPI realted pins to GPIO at initialization

In the EC application, the system may jump between two built Zephyr
images when necessary. When jumping from the current image to the other,
the firmware switches the eSPI-related pins to GPIO function at
initialization if define alt1_no_lpc_espi in def-io-conf-list.
It causes the eSPI to reset and breaks the eSPI communication after the
image jump. This patch prevents it by removing alt1_no_lpc_espi from
def-io-conf-list.

Signed-off-by: Jun Lin <CHLin56@nuvoton.com>