superio/nuvoton: Only set bit 7 of global CR 0x2a for COM A

Currently, when selecting SUPERIO_NUVOTON_NCT*_COM_A, the whole global
control register 0x2a is written to 0x40. CR 0x2a defaults to 0xc0, so
indeed bit 7 is cleared, but the device early init code might have set
other bits in that control register, so setting it to 0x40 might
override already set bits. So, only clear bit 7 and leave the other bits
untouched.

Fixes: f95daa510d ("superio/nuvoton: Add back Nuvoton NCT6776 support")
Change-Id: I9ded9dab3985c4c8e5c45af354ef44af482e18c2
Signed-off-by: Paul Menzel <pmenzel@molgen.mpg.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/46286
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Nico Huber <nico.h@gmx.de>

0 files changed, 0 insertions, 0 deletions