hatch_fp: fix memory mapping of FP buffers
hatch_fp: fix memory mapping of FP buffers

On STM32F412 the buffers are located in the regular SRAM, don't define a
special section.

BRANCH=None
BUG=b:124773209
BUG=b:124996507
TEST=fpenroll+fpmatch

Change-Id: I8659e4587973c4e30c891084691b28326346e1d7
Signed-off-by: Nicolas Norvez <3001a977f47a2bc94ec05551872e2ce88b323556@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1574658
Reviewed-by: Tom Hughes <fc5c12f30a5ed2baa0581f44ee14ad1eb7b20d83@chromium.org>

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