[poky] atom-pc: Drop glibc --with-tls option, its now the only option for glibc

[Richard Purdie]

This option is unused by (e)glibc since 2011 and is the default. It has been
shown to interact badly with the configure option in ia32-base.inc from meta-intel
causing a rebuild of the whole system despite the only change being an 
assignment with += vs =. The easiest fix is simply to drop it.

Signed-off-by: Richard Purdie <richard.purdie at linuxfoundation.org>
---
diff --git a/meta-yocto/conf/machine/atom-pc.conf b/meta-yocto/conf/machine/atom-pc.conf
index 38db414..92d5938 100644
--- a/meta-yocto/conf/machine/atom-pc.conf
+++ b/meta-yocto/conf/machine/atom-pc.conf
@@ -35,7 +35,6 @@ IMAGE_FSTYPES ?= "ext3.lzma live"
 APPEND += "usbcore.autosuspend=1"
 
 GLIBC_ADDONS = "nptl"
-GLIBC_EXTRA_OECONF = "--with-tls"
 
 EXTRA_OECONF_append_pn-matchbox-panel-2 = " --with-battery=acpi"