ec_host_cmd: shi: npcx: not reset when receiving bad data

When the SHI driver receives data from the host and finds it is invalid
(due to a checksum error or an unsupported protocol version),
it currently resets the state machine, initializes the output buffer,
and waits for CS de-assertion. Upon CS de-assertion, the driver resets
the state machine and initializes the output buffer again. This commit
removes the first redundant reset and re-initialization in the function
`shi_npcx_bad_received_data()`, improving the driver’s efficiency.

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