pd: svdm: Don't send response to UFPs attention.
pd: svdm: Don't send response to UFPs attention.

Attention command requires nothing more than goodCRC for validation.  CL
corrects to no longer send acknowledge response.

BRANCH=samus
BUG=none
TEST=manual, see no response acknowledge (just goodCRC) using protocol sniffer.

Change-Id: Ide8a29d1504d677e9b20853d341b31ca5c088a8b
Signed-off-by: Todd Broch <035f5b1f817cbb94019cec357b99778115602b63@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/227394
Reviewed-by: Vincent Palatin <70a9964ec8fd10b0b08fcc8623c2add25ddf99ac@chromium.org>
Reviewed-by: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>
Tested-by: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>
Commit-Queue: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>

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