linux: Bump default to version 4.6.4

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>

linux/Config.in

@@ -27,7 +27,7 @@ choice
 	prompt "Kernel version"
 
 config BR2_LINUX_KERNEL_LATEST_VERSION
-	bool "Latest version (4.6.3)"
+	bool "Latest version (4.6.4)"
 
 config BR2_LINUX_KERNEL_CUSTOM_VERSION
 	bool "Custom version"
@@ -110,7 +110,7 @@ config BR2_LINUX_KERNEL_CUSTOM_LOCAL_PATH
 
 config BR2_LINUX_KERNEL_VERSION
 	string
-	default "4.6.3" if BR2_LINUX_KERNEL_LATEST_VERSION
+	default "4.6.4" if BR2_LINUX_KERNEL_LATEST_VERSION
 	default BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE \
 		if BR2_LINUX_KERNEL_CUSTOM_VERSION
 	default "custom" if BR2_LINUX_KERNEL_CUSTOM_TARBALL