Fix the SETREP and EX_SETLED state machine (keyboard module).
Fix the SETREP and EX_SETLED state machine (keyboard module).

Original code doesn't handle those 2 commands well. SETREP needs a new
state for incoming data byte. EX_SETLED expects 2-byte parameter instead
of 1-byte.

Also enclose all asynchronous debug output in [] for servo-based testing.

BUG=chrome-os-partner:8674
TEST=on the target board. No "Unsupported data 0x00" message is seen.

Change-Id: Icb8e592fe54620677878ee15ef8a781c8906063e

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