stm32: finish cleaning up row/column/input/output naming
stm32: finish cleaning up row/column/input/output naming

This is a purely cosmetic change that removes any remaining
references of rows/columns in favor of inputs/outputs since the
former is inconsistent across platforms.

Higher-level code (such as MKBP) may still refer to logical rows
and columns, but low-level GPIO handling code will refer to GPIOs
by their input/output function.

BUG=none
BRANCH=none
TEST=Tested on Snow (ran finger across all numbers and letters)

Change-Id: Idb8b76e8d013568505d826c3a54a1ed8ce143d12
Signed-off-by: David Hendricks <3b0deacc4b5357f519084f1ea34bd42bf5d34545@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/44982
Reviewed-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>

eatbyte/chromium-ec,alterapraxisptyltd/chromium-ec,coreboot/chrome-ec,coreboot/chrome-ec,mtk09422/chromiumos-platform-ec,mtk09422/chromiumos-platform-ec,thehobn/ec,alterapraxisptyltd/chromium-ec,akappy7/ChromeOS_EC_LED_Diagnostics,akappy7/ChromeOS_EC_LED_Diagnostics,fourier49/BZ_DEV_EC,gelraen/cros-ec,gelraen/cros-ec,gelraen/cros-ec,md5555/ec,longsleep/ec,alterapraxisptyltd/chromium-ec,md5555/ec,coreboot/chrome-ec,fourier49/BZ_DEV_EC,gelraen/cros-ec,akappy7/ChromeOS_EC_LED_Diagnostics,fourier49/BIZ_EC,coreboot/chrome-ec,fourier49/BIZ_EC,longsleep/ec,longsleep/ec,thehobn/ec,thehobn/ec,fourier49/BIZ_EC,coreboot/chrome-ec,thehobn/ec,md5555/ec,eatbyte/chromium-ec,eatbyte/chromium-ec,akappy7/ChromeOS_EC_LED_Diagnostics,mtk09422/chromiumos-platform-ec,eatbyte/chromium-ec,md5555/ec,fourier49/BIZ_EC,fourier49/BZ_DEV_EC,akappy7/ChromeOS_EC_LED_Diagnostics,coreboot/chrome-ec,mtk09422/chromiumos-platform-ec,fourier49/BZ_DEV_EC,alterapraxisptyltd/chromium-ec,longsleep/ec