Cleanup CONFIG_VERSION_VARIABLE migration

CONFIG_VERSION_VARIABLE had already been mostly migrated to Kconfig,
but two headers still referenced it. Also set defaults so that
most of the defconfigs inherit the default rather than needing it
to be set explicitly.

Signed-off-by: Alex Kiernan <alex.kiernan@gmail.com>
Reviewed-by: Petr Vorel <petr.vorel@gmail.com>
diff --git a/configs/apalis_imx6_defconfig b/configs/apalis_imx6_defconfig
index 57249a4..77a4008 100644
--- a/configs/apalis_imx6_defconfig
+++ b/configs/apalis_imx6_defconfig
@@ -14,6 +14,7 @@
 CONFIG_BOOTDELAY=1
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_BOARD_EARLY_INIT_F=y
diff --git a/configs/apalis_imx6_nospl_com_defconfig b/configs/apalis_imx6_nospl_com_defconfig
index 976a66e..89af27f 100644
--- a/configs/apalis_imx6_nospl_com_defconfig
+++ b/configs/apalis_imx6_nospl_com_defconfig
@@ -9,6 +9,7 @@
 CONFIG_BOOTDELAY=1
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_BOARD_EARLY_INIT_F=y
diff --git a/configs/apalis_imx6_nospl_it_defconfig b/configs/apalis_imx6_nospl_it_defconfig
index c89113c..048d4f8 100644
--- a/configs/apalis_imx6_nospl_it_defconfig
+++ b/configs/apalis_imx6_nospl_it_defconfig
@@ -9,6 +9,7 @@
 CONFIG_BOOTDELAY=1
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_BOARD_EARLY_INIT_F=y
diff --git a/configs/colibri_imx6_defconfig b/configs/colibri_imx6_defconfig
index b9c9e11..c19e782 100644
--- a/configs/colibri_imx6_defconfig
+++ b/configs/colibri_imx6_defconfig
@@ -14,6 +14,7 @@
 CONFIG_BOOTDELAY=1
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_BOARD_EARLY_INIT_F=y
diff --git a/configs/colibri_imx6_nospl_defconfig b/configs/colibri_imx6_nospl_defconfig
index 84bd391..aecc179 100644
--- a/configs/colibri_imx6_nospl_defconfig
+++ b/configs/colibri_imx6_nospl_defconfig
@@ -9,6 +9,7 @@
 CONFIG_BOOTDELAY=1
 # CONFIG_CONSOLE_MUX is not set
 CONFIG_SUPPORT_RAW_INITRD=y
+CONFIG_VERSION_VARIABLE=y
 # CONFIG_DISPLAY_BOARDINFO is not set
 CONFIG_DISPLAY_BOARDINFO_LATE=y
 CONFIG_BOARD_EARLY_INIT_F=y