[COMMITTED][AArch64] Tweak the pipeline model for Exynos M1

Tweak the pipeline model for Exynos M1 * gcc/config/aarch64/aarch64.c (exynosm1_tunings): Enable the weak prefetching model. Committed as r234307. -- Evandro Menezes >From a75d875a3c64180c9d6c368e2d87036d70f66036 Mon Sep 17 00:00:00 2001 From: evandro

[COMMITTED][AArch64] Tweak the pipeline model for Exynos M1

Minor tweaks to the cost and scheduling models for Exynos M1. Committed as r233646 and r233647. -- Evandro Menezes >From ab6127823e706361315f1c8b87fb4c32bc299b65 Mon Sep 17 00:00:00 2001 From: evandro Date: Tue, 23 Feb 2016 20:21:23 + Subject: