g: add wake pin info to pinmux command
g: add wake pin info to pinmux command

It is useful to be able to see which pins are set as wake pins and what
type they are. This change adds prints to show_pinmux to describe the
wake pins.

BUG=none
BRANCH=none
TEST='pinmux' should show DIOA12 as a wake_low source.

Change-Id: I2a0ccdbf9b07abb627c3d52c7dd28433a2beff3c
Signed-off-by: Mary Ruthven <81380f3403fed74252e92df3ed012a1819ec6296@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/363494
Reviewed-by: Bill Richardson <129945214b1d548d8e49b6c29c43094f8c78057f@chromium.org>

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