pd: for non dual-role device, always send reject to PR_SWAP
pd: for non dual-role device, always send reject to PR_SWAP

For non dual-role devices, always send reject to power swap request,
PR_SWAP.

BUG=none
BRANCH=samus
TEST=make buildall

Change-Id: I54ce4810cf08a02a1d841308507a0f8de284d987
Signed-off-by: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/227391
Reviewed-by: Todd Broch <035f5b1f817cbb94019cec357b99778115602b63@chromium.org>

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