exfat-nofuse: rename to kmod-fs-exfat0

exFAT fs driver has been upstreamed as a staging driver since linux 5.4.
The package name kmod-fs-exfat is used for that.

Three things happened in this commit

 - The package will only be built for kernel 4.14 and 4.19
 - The driver will be available as opkg package "kmod-fs-exfat0".
   "kmod-fs-exfat" is to be used for the one in upstream kernel
 - Mark "kmod-fs-exfat0" as deprecated in package title

Signed-off-by: Paul Blazejowski <paulb at blazebox.homeip.net>
Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
(rename, rewording, and deprecation)

kernel/exfat-nofuse/Makefile

@@ -24,15 +24,15 @@ PKG_LICENSE_FILES:=LICENSE
 
 include $(INCLUDE_DIR)/package.mk
 
-define KernelPackage/fs-exfat
+define KernelPackage/fs-exfat0
 	SUBMENU:=Filesystems
-	TITLE:=ExFAT Kernel driver
+	TITLE:=ExFAT Kernel driver (deprecated)
 	FILES:=$(PKG_BUILD_DIR)/exfat.ko
 	AUTOLOAD:=$(call AutoLoad,30,exfat,1)
-	DEPENDS:=+kmod-nls-base
+	DEPENDS:=+kmod-nls-base @(LINUX_4_14||LINUX_4_19)
 endef
 
-define KernelPackage/fs-exfat/description
+define KernelPackage/fs-exfat0/description
 	Kernel module for ExFAT Filesytems
 endef
 
@@ -48,4 +48,4 @@ define Build/Compile
 		modules
 endef
 
-$(eval $(call KernelPackage,fs-exfat))
+$(eval $(call KernelPackage,fs-exfat0))