buildroot: Update to 2018.02

Release notes and announcement:

 https://git.buildroot.net/buildroot/plain/CHANGES?id=2018.02

 http://lists.busybox.net/pipermail/buildroot/2018-March/215002.html

Updated packages:

 rsync: 3.1.2 -> 3.1.3
 glibc: glibc-2.26-73 -> glibc-2.26-146
 linux-firmware: a3a26af24e29 -> 65b1c68c63f9
 util-linux: 2.31 -> 2.31.1
 eudev: 3.2.4 -> 3.2.5

Updated host packages:

 libxml2: 2.9.5 -> 2.9.7
 binutils: 2.28.1 -> 2.29.1

Signed-off-by: Joel Stanley <joel@jms.id.au>
[stewart: remove old config option from pseries_defconfig, fix firmware-whitelist]
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>
diff --git a/buildroot b/buildroot
index 4b6188e..05e5240 160000
--- a/buildroot
+++ b/buildroot
@@ -1 +1 @@
-Subproject commit 4b6188e0f2397a013b91105828437c90a3b1dfb7
+Subproject commit 05e5240b2070493684c35ea09592ca2663b95b2f
diff --git a/openpower/configs/pseries_defconfig b/openpower/configs/pseries_defconfig
index b3a78dc..d9258e5 100644
--- a/openpower/configs/pseries_defconfig
+++ b/openpower/configs/pseries_defconfig
@@ -1,6 +1,5 @@
 BR2_powerpc64le=y
 BR2_powerpc_power8=y
-BR2_BINUTILS_VERSION_2_27_X=y
 BR2_BINUTILS_EXTRA_CONFIG_OPTIONS="--enable-targets=powerpc64-linux"
 BR2_EXTRA_GCC_CONFIG_OPTIONS="--enable-targets=powerpc64-linux --disable-libsanitizer"
 BR2_TARGET_GENERIC_HOSTNAME="skiroot"
diff --git a/openpower/scripts/firmware-whitelist b/openpower/scripts/firmware-whitelist
index 0dfbec8..f61f284 100755
--- a/openpower/scripts/firmware-whitelist
+++ b/openpower/scripts/firmware-whitelist
@@ -7,7 +7,8 @@
 whitelist=(     'acenic/'
                 'bnx2/'
                 'bnx2x/bnx2x-e2-7.13.1.0.fw'
-                'cxgb4/'
+                'cxgb4/t4fw-1.16.63.0.bin'
+                'cxgb4/t4fw.bin'
                 'cxgb3/'
                 'e100/'
                 'ql2500_fw.bin'