imx6: move current to 6.12.y

Tested with Udoo: https://paste.next.armbian.com/ojixapowaq

Author: igorpecovnik

config/sources/families/imx6.conf

@@ -18,17 +18,17 @@ case $BRANCH in
 
 	legacy)
 
-		declare -g KERNEL_MAJOR_MINOR="6.1" # Major and minor versions of this kernel.
+		declare -g KERNEL_MAJOR_MINOR="6.6" # Major and minor versions of this kernel.
 		;;
 
 	current)
 
-		declare -g KERNEL_MAJOR_MINOR="6.6" # Major and minor versions of this kernel.
+		declare -g KERNEL_MAJOR_MINOR="6.12" # Major and minor versions of this kernel.
 		;;
 
 	edge)
 
-		declare -g KERNEL_MAJOR_MINOR="6.10" # Major and minor versions of this kernel.
+		declare -g KERNEL_MAJOR_MINOR="6.13" # Major and minor versions of this kernel.
 		;;
 
 esac