boten: enable CONFIG_CHARGE_RAMP_HW
boten: enable CONFIG_CHARGE_RAMP_HW

Set the maximum current limit as 1.5A.

BUG=b:160671921
BRANCH=none
TEST=the maxmium input current is 1.5A when plugging BC1.2 charger.

Signed-off-by: xiong.huang <b69d44a72d0d6950b629843224ec2b5df8468824@bitland.corp-partner.google.com>
Change-Id: I2f4a98d8007a2b4d7a3d818b4cb367608300c60f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2287114
Reviewed-by: Aseda Aboagye <12c9b286316a940fd31c24070da5ab64cdd4d0e7@chromium.org>

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