makefile: remove make export <all variables> instances

Replace all kernel make export <all variables> instances with
export of specific variables.  Depending on existing build
environment, exporting all as environment variables and
interaction with existing environment variable expansions
can lead to undefined behavior.

Change-Id: Ia46600be605828f9e509d5ced5d3ad3f8c6cb140
Signed-off-by: David Ng <[email protected]>

Makefile

@@ -3,7 +3,6 @@
 # auto-detect subdirs
 ifeq ($(CONFIG_ARCH_KONA), y)
 include $(srctree)/techpack/display/config/konadisp.conf
-export
 endif
 
 ifeq ($(CONFIG_ARCH_KONA), y)

config/konadisp.conf

@@ -1,14 +1,13 @@
-CONFIG_DRM_MSM=y
-CONFIG_DRM_MSM_SDE=y
-CONFIG_SYNC_FILE=y
-CONFIG_DRM_MSM_DSI=y
-CONFIG_DRM_MSM_DP=y
-CONFIG_QCOM_MDSS_DP_PLL=y
-CONFIG_DSI_PARSER=y
-CONFIG_DRM_SDE_WB=y
-CONFIG_DRM_MSM_REGISTER_LOGGING=y
-CONFIG_QCOM_MDSS_PLL=y
-CONFIG_MSM_SDE_ROTATOR=y
-CONFIG_MSM_SDE_ROTATOR_EVTLOG_DEBUG=y
-CONFIG_DRM_SDE_RSC=y
-
+export CONFIG_DRM_MSM=y
+export CONFIG_DRM_MSM_SDE=y
+export CONFIG_SYNC_FILE=y
+export CONFIG_DRM_MSM_DSI=y
+export CONFIG_DRM_MSM_DP=y
+export CONFIG_QCOM_MDSS_DP_PLL=y
+export CONFIG_DSI_PARSER=y
+export CONFIG_DRM_SDE_WB=y
+export CONFIG_DRM_MSM_REGISTER_LOGGING=y
+export CONFIG_QCOM_MDSS_PLL=y
+export CONFIG_MSM_SDE_ROTATOR=y
+export CONFIG_MSM_SDE_ROTATOR_EVTLOG_DEBUG=y
+export CONFIG_DRM_SDE_RSC=y