hmibsc_defconfig: disable DM_USB_GADGET

As with the db410c this breaks linking as it conflicts with the USB
controller used by these platforms.

This fixes building after DM_USB_GADGET was enabled by default for
mach-snapdragon.

Fixes: 7235dbedfce3 (mach-snapdragon: enable DM_USB_GADGET by default)
Reviewed-by: Sumit Garg <sumit.garg@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250402142812.368168-1-caleb.connolly@linaro.org
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
1 file changed