MIPS: Ingenic: Fix bugs when detecting X1000's parameters v4
From: Zhou Yanjie
Date: Fri Aug 02 2019 - 04:28:33 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)".
v3->v4: Change the commit title.