d4d270a Allow field_10x26_arm.s to compile for ARMv7 architecture (Roman Zeyde)
Pull request description:
It would allow using optimized field operations on the TREZOR device, which is using ARMv7 Cortex-M4.
Following https://github.com/trezor/trezor-core/pull/500 and part of https://github.com/trezor/trezor-firmware/issues/66.
Tree-SHA512: 73c0f03503feff01c6f4efd884e916ae1f43f55d525e8c3ea9372cf777aef6901585b74774c316dd7937abfff5e86be5b1acb569f9eeee9b73ae088f0f6b589d