MIPS: Ingenic: Fix bugs when detecting X1000's parameters v3
From: Zhou Yanjie
Date: Thu Aug 01 2019 - 08:18:05 EST
v1->v2: Use "set_c0_config7(BIT(4))" to simplify code and add comment.
v2->v3: Split patch and use "MIPS_CONF7_BTB_LOOP_EN" to instead "BIT(4)".