btrfs-progs: Update to version 5.2.1

GPL-2.0 is deprecated License Identifier according to SPDX.
- Correct it to GPL-2.0-only

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

utils/btrfs-progs/Makefile

@@ -6,16 +6,16 @@
 include $(TOPDIR)/rules.mk
 
 PKG_NAME:=btrfs-progs
-PKG_VERSION:=5.1.1
+PKG_VERSION:=5.2.1
 PKG_RELEASE:=1
 
 PKG_SOURCE:=$(PKG_NAME)-v$(PKG_VERSION).tar.xz
 PKG_SOURCE_URL:=@KERNEL/linux/kernel/people/kdave/btrfs-progs
-PKG_HASH:=9cb91b7de9e10aa6bbf2b003f60bb3f5e5b1984a8008fad7c4b2d3978f5ebe1b
+PKG_HASH:=36ac4a0198ffff79d5800c537ea4b19769a8fd3ad870f75413d25b20e2d83233
 PKG_BUILD_DIR:=$(BUILD_DIR)/$(PKG_NAME)-v$(PKG_VERSION)
 
 PKG_MAINTAINER:=Karel Kočí <karel.koci@nic.cz>
-PKG_LICENSE:=GPL-2.0
+PKG_LICENSE:=GPL-2.0-only
 PKG_LICENSE_FILES:=COPYING
 
 PKG_INSTALL:=1