[meta-freescale] [meta-fsl-ppc][PATCH 12/12] multilib: use ?= to allow overridden in local.conf

[ting.liu at freescale.com]

From: Ting Liu <ting.liu at freescale.com>

the multilib setting have already been moved to the machine
configure file. according to the including order in bitbake.conf
the machine configure file is after local.conf file.so the value
in local.conf will be overridden. change to use ?=.

This is useful when using external toolchain which does not need
to enable multilib.

Signed-off-by: Zongchun Yu <Zongchun.Yu at freescale.com>
---
 conf/machine/include/e5500-64b.inc | 4 ++--
 conf/machine/include/e6500-64b.inc | 4 ++--
 conf/machine/include/e6500.inc     | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/conf/machine/include/e5500-64b.inc b/conf/machine/include/e5500-64b.inc
index a8b69dd..d6d3cfd 100644
--- a/conf/machine/include/e5500-64b.inc
+++ b/conf/machine/include/e5500-64b.inc
@@ -7,7 +7,7 @@ require conf/machine/include/qoriq-base.inc
 MACHINEOVERRIDES .= ":e5500-64b"
 
 require conf/multilib.conf
-MULTILIBS = "multilib:lib32"
-DEFAULTTUNE_virtclass-multilib-lib32 = "ppce5500"
+MULTILIBS ?= "multilib:lib32"
+DEFAULTTUNE_virtclass-multilib-lib32 ?= "ppce5500"
 USER_CLASSES_remove = "image-prelink"
 
diff --git a/conf/machine/include/e6500-64b.inc b/conf/machine/include/e6500-64b.inc
index 6b7297b..f98f402 100644
--- a/conf/machine/include/e6500-64b.inc
+++ b/conf/machine/include/e6500-64b.inc
@@ -7,7 +7,7 @@ require conf/machine/include/qoriq-base.inc
 MACHINEOVERRIDES .= ":e6500-64b"
 
 require conf/multilib.conf
-MULTILIBS = "multilib:lib32"
-DEFAULTTUNE_virtclass-multilib-lib32 = "ppce6500"
+MULTILIBS ?= "multilib:lib32"
+DEFAULTTUNE_virtclass-multilib-lib32 ?= "ppce6500"
 USER_CLASSES_remove = "image-prelink"
 
diff --git a/conf/machine/include/e6500.inc b/conf/machine/include/e6500.inc
index e6848bd..4121fbe 100644
--- a/conf/machine/include/e6500.inc
+++ b/conf/machine/include/e6500.inc
@@ -8,6 +8,6 @@ MACHINEOVERRIDES .= ":e6500"
 BUILD_64BIT_KERNEL = "1"
 
 require conf/multilib.conf
-MULTILIBS = "multilib:lib64"
-DEFAULTTUNE_virtclass-multilib-lib64 = "ppc64e6500"
+MULTILIBS ?= "multilib:lib64"
+DEFAULTTUNE_virtclass-multilib-lib64 ?= "ppc64e6500"
 
-- 
1.9.1