feat(plat/mediatek/common): enable software reset for CIRQ

CIRQ software reset can be used on all platforms, so we remove
CIRQ_NEED_SW_RESET in mt_cirq_sw_reset to enable software reset.

BUG=b:192200380, b:201035723

Change-Id: Id53ea099ae566bf2a573fca866bd10c60429bd5a
1 file changed