defconfig: msm: set the size of printk buffer as default

Set the size of printk buffer as default, which is 128KB.

Change-Id: If2d81ac2a8d6b8ac108e632200fde4da3a81d605
Signed-off-by: Jiangjiang Shen <jiangjia@codeaurora.org>
diff --git a/arch/arm/configs/spyro-perf_defconfig b/arch/arm/configs/spyro-perf_defconfig
index 38485c7..28354d9 100644
--- a/arch/arm/configs/spyro-perf_defconfig
+++ b/arch/arm/configs/spyro-perf_defconfig
@@ -13,7 +13,6 @@
 CONFIG_RCU_FAST_NO_HZ=y
 CONFIG_RCU_NOCB_CPU=y
 CONFIG_RCU_NOCB_CPU_ALL=y
-CONFIG_LOG_BUF_SHIFT=15
 CONFIG_LOG_CPU_MAX_BUF_SHIFT=13
 CONFIG_CPUSETS=y
 CONFIG_CGROUP_CPUACCT=y