npcx7_evb: fix typos in the declaration of ADC3/4 channels
npcx7_evb: fix typos in the declaration of ADC3/4 channels

This CL fixes the typos of the enumeration values of ADC3 and ADC4 in the
declaration of adc_channels[].

BRANCH=none
BUG=none
TEST=No build errors for make buildall. Test the image of
npcx7_evb board on EVB.

Change-Id: I510ad08f1dbc5ef668e28934d63cf73c7e5f5b5c
Signed-off-by: CHLin <84d2fca36f9d804bb7b1903655f14e4c722a99c4@nuvoton.com>
Reviewed-on: https://chromium-review.googlesource.com/569498
Commit-Ready: Jun Lin <fd4c48e514879a8646c2e4c131e0c122d71fea6b@gmail.com>
Tested-by: Jun Lin <fd4c48e514879a8646c2e4c131e0c122d71fea6b@gmail.com>
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>
Reviewed-by: Mulin Chao <6bbc5af053a1dfdc363be6857f30de4ac3bcbd16@nuvoton.com>

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