pd: fix typo in state machine.
pd: fix typo in state machine.

return from pd_task should be break from switch instead.

Signed-off-by: Todd Broch <035f5b1f817cbb94019cec357b99778115602b63@chromium.org>

BRANCH=samus
BUG=none
TEST=compiles

Change-Id: Id0c33b64cd438705f8b96f1eac764d5cb1b2ae9e
Reviewed-on: https://chromium-review.googlesource.com/236946
Tested-by: Todd Broch <035f5b1f817cbb94019cec357b99778115602b63@chromium.org>
Reviewed-by: Alec Berg <1a4429eeda29095a12e19a73405f80f5b7f37a63@chromium.org>
Commit-Queue: Todd Broch <035f5b1f817cbb94019cec357b99778115602b63@chromium.org>

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