soc/amd(MDN/PHX/Glinda): Update DISABLE_KEYBOARD_RESET_PIN help

For MDN, PHX, & Glinda platforms, the Keyboard Reset functionality has
been moved from GPIO 129 to GPIO 21.

Additionally, the issue where the system would reset when the KBDRST_L
pin went low even when not configured for Keyboard reset seems to have
been fixed, so remove that text.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: Iefe7e00d63777577b59ee98cb974b07afea1fd12
Reviewed-on: https://review.coreboot.org/c/coreboot/+/72912
Reviewed-by: Jon Murphy <jpmurphy@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Eric Lai <eric_lai@quanta.corp-partner.google.com>

0 files changed, 0 insertions, 0 deletions