flash_ec: add support for hatch_fp
flash_ec: add support for hatch_fp

Same as nocturne_fp.

BRANCH=None
BUG=b:124996507
TEST=manually flash over UART/servo

Change-Id: I2218a7bfd9dea5b31ec10b1738c9b26ccbd291b9
Signed-off-by: Nicolas Norvez <3001a977f47a2bc94ec05551872e2ce88b323556@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1541828
Commit-Ready: ChromeOS CL Exonerator Bot <fa429e5907f00867f797423aea74327bb02c91b6@appspot.gserviceaccount.com>
Tested-by: Tom Hughes <fc5c12f30a5ed2baa0581f44ee14ad1eb7b20d83@chromium.org>

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