arm/configs: hammerhead: remove SysV IPC from kernel

System V IPCs are not compliant with Android's application lifecycle
because allocated resources are not freeable by the low memory killer.
This lead to global kernel resource leakage.

For example, there is no way to automatically release a SysV
semaphore allocated in the kernel when:
- a buggy or malicious process exits
- a non-buggy and non-malicious process crashes or is explicitly
  killed.

Killing processes automatically to make room for new ones is an
important part of Android's application lifecycle implementation.
This means that, even assuming only non-buggy and non-malicious
code, it is very likely that over time, the kernel global tables
used to implement SysV IPCs will fill up.

Bug: 24551430
Bug: 22300191

Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Signed-off-by: Patrick Tjin <pattjin@google.com>
Change-Id: Ibaaad7c3d99c509ec360b715323807ebe0027ab0

arch/arm/configs/hammerhead_defconfig

 # CONFIG_ARM_PATCH_PHYS_VIRT is not set
 CONFIG_EXPERIMENTAL=y
 # CONFIG_SWAP is not set
-CONFIG_SYSVIPC=y
 CONFIG_AUDIT=y
 CONFIG_RCU_FAST_NO_HZ=y
 CONFIG_LOG_BUF_SHIFT=19
@@ -14,7 +13,6 @@ CONFIG_CGROUP_SCHED=y
 CONFIG_RT_GROUP_SCHED=y
 CONFIG_NAMESPACES=y
 # CONFIG_UTS_NS is not set
-# CONFIG_IPC_NS is not set
 # CONFIG_USER_NS is not set
 # CONFIG_PID_NS is not set
 CONFIG_RELAY=y
@@ -59,7 +57,6 @@ CONFIG_MSM_PIL_VENUS=y
 # CONFIG_MSM_BUSPM_DEV is not set
 CONFIG_MSM_TZ_LOG=y
 CONFIG_MSM_RPM_RBCPR_STATS_V2_LOG=y
-CONFIG_MSM_RPM_STATS_LOG=y
 CONFIG_MSM_DIRECT_SCLK_ACCESS=y
 CONFIG_MSM_EVENT_TIMER=y
 CONFIG_MSM_BUS_SCALING=y