flash_ec: remove 'BOARD' check in recognizing npcx_int_spi.
flash_ec: remove 'BOARD' check in recognizing npcx_int_spi.

CQ-DEPEND=CL:1432782
BUG=b:123098518
BRANCH=none
TEST=manually ran flash_ec on coral.
(servo_v4_with_ccd_cr50 or ccd_cr50)
util/flash_ec --board coral --image ${IMG_PATH} --verbose
util/flash_ec --chip npcx_spi --image ${IMG_PATH} --verbose

(servo_v4_with_servo_micro)
util/flash_ec --board grunt --image ${IMG_PATH} --verbose
util/flash_ec --chip npcx_int_spi --image ${IMG_PATH} --verbose

(servo_v2)
util/flash_ec --board coral --image ${IMG_PATH} --verbose
util/flash_ec --chip npcx_spi --read ${TMP_PATH} --verbose
util/flash_ec --board grunt --image ${IMG_PATH} --verbose
util/flash_ec --chip npcx_int_spi --read ${TMP_PATH} --verbose

Change-Id: I02a1c8d2f5dd64c217eb434282be4992b3a2b1f2
Signed-off-by: Namyoon Woo <e8732cefb861f07768f47df788a8e8eb75efc09a@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1446537
Commit-Ready: ChromeOS CL Exonerator Bot <fa429e5907f00867f797423aea74327bb02c91b6@appspot.gserviceaccount.com>
Reviewed-by: Wai-Hong Tam <04b587fdf5845741a0c5a8b9cd59ca72d73ef8fc@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec